ISO/IEC 27001:2022 — SP 800-53 Coverage
How well do NIST SP 800-53 Rev 5 controls address each ISO 27001:2022 requirement? This analysis maps from framework clauses back to SP 800-53, with expert coverage weightings and gap identification.
Clause-by-Clause Analysis
Sorted by clause4.1 Understanding the organization and its context
Rationale
RA-03 covers risk context; PM-08/PM-11 cover mission/business process definition. PM-32 (Purposing) adds analysis of systems supporting missions and business functions. ISO 27001 clause 4.1 requires broader organizational context analysis including external/internal issues beyond pure security risk.
Gaps
No direct SP 800-53 control for analyzing external/internal issues (political, economic, social factors) affecting ISMS. Organizational context determination is broader than security risk assessment.
4.2 Understanding the needs and expectations of interested parties
Rationale
PM-08 addresses critical infrastructure plan; PM-11 mission/business process definition; SR-01, SR-02, SR-03 address supply chain stakeholder relationships. These partially address stakeholder needs but ISO requires systematic identification of all interested parties and their requirements.
Gaps
SP 800-53 lacks explicit requirement to identify all interested parties (regulators, customers, partners) and their specific ISMS expectations. Stakeholder mapping and requirements analysis not directly covered.
4.3 Determining the scope of the ISMS
Rationale
PM-01 (information security program plan) and PM-10 (authorization process) help define boundaries. PM-07 helps identify system inventory. PL-10 (Baseline Selection) requires determining the systems and boundaries for which baselines apply, supporting scope definition.
Gaps
SP 800-53 defines system boundaries per authorization but doesn't explicitly require ISMS scope statement. Multi-system/enterprise scope determination differs from individual system authorization boundaries.
4.4 Information security management system
Rationale
PM family establishes program-level controls. PM-01 defines program plan; PM-02 assigns roles; PM-03 covers resources; PM-06 measures effectiveness. PL-09 (Central Management) adds centralized management of selected controls and processes across the organization, supporting ISMS as a coherent management system.
Gaps
SP 800-53 doesn't use PDCA/process approach terminology. Continuous improvement cycle and ISMS as a formal management system with documented processes is implicit rather than explicit.
5.1 Leadership and commitment
Rationale
PM-01 requires senior official for security program; PM-02 assigns risk management roles; PM-13 addresses security workforce. PM-29 (Risk Management Program Leadership) specifically addresses senior leadership roles in risk management. Leadership accountability is addressed but ISO requires more explicit top management commitment.
Gaps
SP 800-53 doesn't explicitly require top management to demonstrate commitment through resource allocation, communication of importance, or ensuring ISMS achieves intended outcomes.
5.2 Policy
Rationale
PL-01 directly requires security planning policy with management approval. PM-01 requires information security program plan. Policy establishment, approval, and communication well covered.
Gaps
Minor: ISO specifies policy must be 'appropriate to the purpose of the organization' and 'available as documented information' with specific distribution requirements.
5.3 Organizational roles, responsibilities, and authorities
Rationale
PM-02 directly assigns information security responsibilities. PL-01 covers planning roles. PS-01 covers personnel security roles. PS-09 (Position Descriptions) explicitly requires incorporating security and privacy roles into organizational position descriptions, directly supporting ISO's requirement to assign and communicate responsibilities.
Gaps
Minimal gap. With PS-09, the requirement for security responsibilities to be incorporated into position descriptions is now explicitly covered.
6.1 Actions to address risks and opportunities
Rationale
RA family directly addresses risk assessment. PM-09 covers risk management strategy. RA-03 is comprehensive risk assessment. RA-07 (Risk Response) explicitly addresses responding to risk findings with options including mitigation, acceptance, sharing, or avoidance. PL-10/PL-11 (Baseline Selection/Tailoring) address systematic control selection and customization to address identified risks.
Gaps
ISO explicitly requires considering 'opportunities' alongside risks. SP 800-53 is risk-focused but doesn't explicitly address opportunities for improvement. Risk acceptance criteria less formalized.
6.1.3 Information security risk treatment
Rationale
RA-03 covers risk assessment; PM-09 risk strategy; CA-05 plan of action and milestones for risk treatment. RA-07 (Risk Response) directly addresses risk treatment decisions including mitigating, accepting, sharing, or avoiding risk. PL-10/PL-11 cover baseline selection and tailoring as a systematic risk treatment approach.
Gaps
ISO requires explicit Statement of Applicability (SoA) document. SP 800-53 doesn't have a direct SoA equivalent, though system security plans and baseline tailoring serve a similar purpose.
6.2 Information security objectives and planning to achieve them
Rationale
PM-01 includes program objectives; PM-03 addresses resource planning; PM-06 covers security measures of performance. Objective-setting partially covered.
Gaps
ISO requires measurable security objectives at relevant functions/levels with explicit plans (what, resources, responsible, completion, evaluation). SP 800-53 is less prescriptive about objective-setting methodology.
6.3 Planning of changes
Rationale
CM-03 covers configuration change control; CM-04 impact analysis; SA-10 developer change management. Change planning well addressed from technical perspective.
Gaps
ISO 6.3 is about planned changes to the ISMS itself (management system changes), not just technical changes. Organizational/process changes to the ISMS are not directly covered.
7.1 Resources
Rationale
PM-03 directly addresses information security resources. SA-03 covers system development life cycle resources. SA-02 (Allocation of Resources) addresses determining resource requirements and including security in capital planning and investment control.
Gaps
ISO requirement is broader - all resources needed for ISMS establishment, implementation, maintenance, and continual improvement. Budget allocation and resource planning less prescriptive in SP 800-53.
7.2 Competence
Rationale
PM-13 directly addresses security workforce/competence. AT-02/AT-03 cover awareness and training. PM-16 covers threat awareness. AT-06 (Training Feedback) provides feedback on training results to senior personnel, supporting competence evaluation and continuous improvement of training programs.
Gaps
Minor: ISO requires retaining documented evidence of competence (training records, certifications). AT-04 handles training records; AT-06 adds evaluation feedback loop.
7.3 Awareness
Rationale
AT-02 directly covers security awareness training including policy awareness, roles/responsibilities, and consequences. Very well aligned with ISO requirement.
Gaps
Minimal gap. AT-02 covers awareness of policy, contribution to ISMS effectiveness, and implications of non-conformance.
7.4 Communication
Rationale
PM-01 includes communication aspects of security program; PL-04 covers rules of behavior communication; IR-07 covers incident reporting communication.
Gaps
ISO requires determining what, when, with whom, and how to communicate regarding ISMS. SP 800-53 lacks a systematic communication planning control. Internal/external communication strategy not explicitly required.
7.5 Documented information
Rationale
PL-02 (system security plan) and PM-01 (program plan) address documentation. AU family covers audit records. Documentation requirements partially met.
Gaps
ISO has specific requirements for documented information control (creation, updating, version control, distribution, access, storage, disposal). SP 800-53 doesn't have a unified document management control.
8.1 Operational planning and control
Rationale
PL-02 covers system security plan implementation; PM-01 covers program implementation; CA-02 covers assessment of controls. PL-09 (Central Management) adds centralized operational management of controls. PL-10/PL-11 (Baseline Selection/Tailoring) support systematic operational control selection.
Gaps
ISO requires organizations to plan, implement, and control processes needed to meet requirements. Outsourced process control and documented evidence of process execution are gaps.
8.2 Information security risk assessment
Rationale
RA-03 directly covers risk assessment at planned intervals or when significant changes occur. RA-05 covers vulnerability assessment. RA-09 (Criticality Analysis) adds identification of critical system components and functions, strengthening risk assessment with asset criticality determination.
Gaps
Minimal gap. RA-03 comprehensively covers risk assessment execution, and RA-09 adds critical component identification. ISO emphasizes retaining documented results.
8.3 Information security risk treatment
Rationale
CA-05 (POA&M) addresses risk treatment plans. PM-04 tracks system-level plans. RA-03 includes risk response identification. RA-07 (Risk Response) explicitly addresses risk treatment with options for mitigation, acceptance, sharing, or avoidance, closely aligning with ISO risk treatment concepts.
Gaps
Minor: ISO requires retaining documented results of risk treatment. POA&M process is close but doesn't perfectly map to ISO risk treatment plan format.
9.1 Monitoring, measurement, analysis and evaluation
Rationale
CA-07 (continuous monitoring) and PM-06 (measures of performance) directly address monitoring and measurement. SI-04 covers system monitoring. PM-14 (Testing, Training, and Monitoring) addresses testing and monitoring activities.
Gaps
ISO requires determining what to monitor, methods, when, who analyzes results. PM-06 is less prescriptive about evaluation methods and timing.
9.2 Internal audit
Rationale
CA-02 covers security assessments (functionally equivalent to audits). CA-07 continuous monitoring. AU-06 audit review.
Gaps
ISO requires formal internal audit program with defined criteria, scope, frequency, methods, and auditor independence. CA-02 covers assessments but doesn't use audit terminology or require audit program management.
9.3 Management review
Rationale
PM-01 requires periodic program review; PM-06 covers performance measurement. These partially address management review.
Gaps
ISO specifies detailed management review inputs (audit results, stakeholder feedback, risk assessment changes, opportunities for improvement) and outputs (decisions, resource changes). SP 800-53 lacks formal management review structure.
10.1 Continual improvement
Rationale
CA-07 continuous monitoring supports improvement; PM-06 measures effectiveness; PM-01 includes program updates.
Gaps
ISO requires explicit continual improvement processes for ISMS suitability, adequacy, and effectiveness. SP 800-53 supports continuous monitoring but doesn't explicitly require PDCA-style continual improvement methodology.
10.2 Nonconformity and corrective action
Rationale
CA-05 (POA&M) addresses remediation of identified weaknesses. PM-04 tracks remediation plans. RA-07 (Risk Response) addresses responding to findings from assessments and audits, aligning with corrective action requirements.
Gaps
ISO requires formal nonconformity management including root cause analysis, corrective action implementation, and effectiveness review. POA&M process is close but lacks formal nonconformity management structure.
A.5.1 Policies for information security
Rationale
SP 800-53 has extensive policy controls (-01 controls) for every family. PL-01 is the overarching planning policy. PM-01 establishes program plan. PT-01 and SR-01 (new in Rev 5) add privacy and supply chain policy requirements for comprehensive policy framework.
Gaps
Minimal gap. SP 800-53 policy requirements are more granular (per-family) while ISO expects a coherent policy set.
A.5.2 Information security roles and responsibilities
Rationale
PM-02 directly assigns senior information security role. PS-01 covers personnel security roles. PS-09 (Position Descriptions) explicitly requires incorporating security and privacy roles into organizational position descriptions, strengthening role definition coverage.
Gaps
Minimal gap. With PS-09, ISO's requirement for defined security roles and responsibilities is comprehensively addressed.
A.5.3 Segregation of duties 95%
Rationale
AC-05 directly addresses separation of duties. Comprehensive coverage.
Gaps
Minimal gap.
Mapped Controls
A.5.4 Management responsibilities
Rationale
PM-02 covers management roles; PM-13 workforce management; PS-01 personnel policies. PM-29 (Risk Management Program Leadership) adds explicit senior leadership roles and accountability for security management.
Gaps
ISO emphasizes management requiring personnel to apply security per policies. SP 800-53 is less explicit about management enforcement responsibility.
A.5.5 Contact with authorities
A.5.6 Contact with special interest groups
A.5.7 Threat intelligence
Rationale
PM-16 addresses threat awareness program. SI-05 covers security alerts and advisories. RA-03/RA-05 include threat identification. RA-10 (Threat Hunting) adds proactive cyber threat hunting capability to search for indicators of compromise and detect advanced threats.
Gaps
Minimal gap. SP 800-53 with RA-10 is comprehensive on threat intelligence, including proactive threat hunting.
A.5.8 Information security in project management
Rationale
SA-03 covers security in SDLC; SA-04 acquisition security requirements; PM-07 enterprise architecture.
Gaps
ISO specifically requires security in ALL project management regardless of project type. SA controls focus on system/software projects specifically.
A.5.9 Inventory of information and other associated assets
Rationale
CM-08 directly covers system component inventory. PM-05 covers system inventory. CM-12 (Information Location) identifies and documents the location of information types and the specific system components on which information is processed and stored, directly addressing ISO's requirement for an inventory of information assets.
Gaps
Minor: ISO includes 'associated assets' beyond information and system components. CM-12 significantly strengthens the information asset inventory mapping.
A.5.10 Acceptable use of information and other associated assets
A.5.11 Return of assets 90%
Rationale
PS-04 covers personnel termination including return of organizational assets.
Gaps
Minimal gap.
Mapped Controls
A.5.12 Classification of information 85%
Rationale
RA-02 covers security categorization of information and systems. Well aligned.
Gaps
Minor: ISO uses classification levels; SP 800-53 uses FIPS 199 categorization. Conceptually similar but terminology/methodology differs.
Mapped Controls
A.5.13 Labelling of information
Rationale
MP-03 covers media marking/labeling. RA-02 supports categorization for labeling. AC-16 (Security and Privacy Attributes) supports association of attributes with information for labeling and access control purposes.
Gaps
Minor: ISO covers labeling of all information forms; MP-03 focuses on media but AC-16 addresses digital labeling.
A.5.14 Information transfer
Rationale
SC-07 boundary protection; SC-08 transmission confidentiality/integrity; AC-04 information flow enforcement; AC-20 external system use. CA-03 (Information Exchange) addresses information exchange agreements with external systems.
Gaps
Minor: ISO includes transfer agreements and policies for all forms (electronic, physical, verbal). SP 800-53 focuses on technical controls but CA-03 adds exchange agreements.
A.5.15 Access control
A.5.16 Identity management
A.5.17 Authentication information
A.5.18 Access rights
A.5.19 Information security in supplier relationships
Rationale
SA-04 acquisition security requirements; SA-09 external system services; SR family covers supply chain risk.
Gaps
Minor: ISO emphasizes ongoing supplier relationship management and periodic review. SP 800-53 focuses more on acquisition-time requirements.
A.5.20 Addressing information security within supplier agreements
Rationale
SA-04 directly requires security requirements in acquisitions. SA-09 covers service agreements. SR-03 covers supply chain controls and processes in agreements.
Gaps
Minor: ISO requires specific agreement terms for information protection. SA-04 is comprehensive but format differs.
A.5.21 Managing information security in the ICT supply chain
Rationale
SR family comprehensively addresses supply chain risk management including ICT supply chain. SR-05 covers acquisition strategies; SR-06 supplier assessments; SR-11 component authenticity.
Gaps
Minimal gap. SP 800-53 SR family is well aligned with ISO supply chain requirements.
A.5.22 Monitoring, review and change management of supplier services
Rationale
SA-09 includes external service monitoring; SR-06 supplier assessments; CA-07 continuous monitoring.
Gaps
ISO requires regular monitoring and review of supplier service delivery, change management of supplier services. SP 800-53 is less prescriptive about ongoing supplier service monitoring cadence.
A.5.23 Information security for use of cloud services
Rationale
SA-09 covers external information system services (includes cloud); AC-20 external systems; SC-07 boundary protection.
Gaps
ISO 27001:2022 added cloud-specific control. SP 800-53 addresses cloud through general external service controls but lacks cloud-specific acquisition, use, management, and exit requirements. FedRAMP supplements this.
A.5.24 Information security incident management planning and preparation
A.5.25 Assessment and decision on information security events
A.5.26 Response to information security incidents
A.5.27 Learning from information security incidents
Rationale
IR-03 includes lessons learned; IR-04 includes incident analysis. Post-incident review addressed.
Gaps
Minor: ISO emphasizes using incident knowledge to reduce future likelihood/impact systematically. SP 800-53 less prescriptive on knowledge management from incidents.
A.5.28 Collection of evidence
Rationale
IR-04 includes evidence collection; AU-03 content of audit records; AU-06 audit review; AU-11 audit record retention.
Gaps
Minor: ISO focuses on digital forensics evidence handling for legal proceedings. SP 800-53 covers audit records but evidence handling for legal admissibility less explicit.
A.5.29 Information security during disruption
A.5.30 ICT readiness for business continuity
Rationale
CP family covers IT contingency planning including alternate processing, telecommunications, recovery. CP-13 addresses alternative security mechanisms.
Gaps
Minor: ISO emphasizes ICT readiness specifically supporting business continuity plans. SP 800-53 focuses on IT contingency but connection to broader BCP is implicit.
A.5.31 Legal, statutory, regulatory and contractual requirements
Rationale
PL-04 includes compliance obligations; PM-01 addresses regulatory compliance; SA-04 contractual requirements.
Gaps
ISO requires explicit identification and documentation of all legal/regulatory/contractual requirements. SP 800-53 lacks a dedicated legal compliance identification control. FISMA context assumes federal requirements.
A.5.32 Intellectual property rights 15%
Rationale
No direct SP 800-53 control for intellectual property management.
Gaps
Significant gap. SP 800-53 does not address software licensing, copyright compliance, or IP protection. Requires supplementary organizational controls.
A.5.33 Protection of records
Rationale
AU-11 covers audit record retention; SI-12 covers information management and retention.
Gaps
ISO requires protection of records from loss, destruction, falsification per legal/regulatory requirements. SP 800-53 covers retention but broader records management (classification, disposal schedules) less explicit.
A.5.34 Privacy and protection of PII
Rationale
PT family (added in Rev 5) directly addresses privacy. PM-25 minimization; PM-26 complaint management; PM-27 privacy reporting.
Gaps
Minor: ISO defers to ISO 27701 for full privacy coverage. SP 800-53 PT family is comprehensive for PII protection.
A.5.35 Independent review of information security
Rationale
CA-02 covers security assessments which serve as independent reviews. CA-07 continuous monitoring; PM-06 performance measurement.
Gaps
ISO requires independent review of the ISMS approach, not just technical control assessment. Management system review independence less explicit in SP 800-53.
A.5.36 Compliance with policies, rules and standards
Rationale
CA-02 assesses compliance; AU-06 reviews audit records for compliance; PM-06 measures performance.
Gaps
Minor: ISO requires regular review that information processing complies with policies. SP 800-53 assessment approach differs from compliance checking methodology.
A.5.37 Documented operating procedures
Rationale
PL-02 covers system security plans documenting procedures; SA-05 system documentation; CM-01 configuration management procedures.
Gaps
ISO requires documented operating procedures for information processing facilities. SP 800-53 has family-specific procedures but no unified operating procedures control.
A.6.1 Screening 90%
Rationale
PS-03 directly covers personnel screening before access is granted.
Gaps
Minimal gap.
Mapped Controls
A.6.2 Terms and conditions of employment
Rationale
PS-06 covers access agreements; PL-04 covers rules of behavior. PS-09 (Position Descriptions) requires security responsibilities in position descriptions which directly relates to employment terms and conditions.
Gaps
Minor: ISO includes security responsibilities in employment contracts. SP 800-53 focuses on access agreements and position descriptions rather than employment contract terms, but PS-09 strengthens coverage.
A.6.3 Information security awareness, education and training
Rationale
AT-02 awareness training; AT-03 role-based training; AT-04 training records; PM-13 workforce program. AT-06 (Training Feedback) provides feedback on training results to senior personnel, enabling continuous improvement of training programs.
Gaps
Minimal gap. AT-06 strengthens the training evaluation cycle.
A.6.4 Disciplinary process 80%
Rationale
PS-08 covers personnel sanctions for security violations.
Gaps
ISO requires formal disciplinary process communicated to employees. PS-08 addresses sanctions but formal process establishment less detailed.
Mapped Controls
A.6.5 Responsibilities after termination or change of employment
A.6.6 Confidentiality or non-disclosure agreements 80%
Rationale
PS-06 covers access agreements which include confidentiality requirements.
Gaps
ISO specifically requires NDAs reflecting organizational needs. PS-06 is broader (access agreements) and NDA specifics are less detailed.
Mapped Controls
A.6.7 Remote working
A.6.8 Information security event reporting
A.7.1 Physical security perimeters
A.7.2 Physical entry
A.7.3 Securing offices, rooms and facilities
A.7.4 Physical security monitoring
A.7.5 Protecting against physical and environmental threats
Rationale
PE family comprehensively covers environmental protections: power (PE-09,11), fire (PE-13), temperature (PE-14), water (PE-15). PE-23 (Facility Location) adds planning facility location considering physical and environmental hazards, directly addressing threat protection at the site selection level.
Gaps
Minimal gap. PE-23 strengthens coverage by addressing hazard considerations in facility location planning.
A.7.6 Working in secure areas
A.7.7 Clear desk and clear screen
A.7.8 Equipment siting and protection
Rationale
PE-14 covers environmental controls; PE-18 location of components. PE-23 (Facility Location) addresses planning facility/site location considering physical and environmental hazards, supporting equipment siting decisions.
Gaps
ISO includes equipment placement to minimize unauthorized access and environmental hazards. SP 800-53 less specific about equipment siting methodology but PE-23 adds site-level considerations.
A.7.9 Security of assets off-premises
A.7.10 Storage media
Rationale
MP family comprehensively covers media protection: policy (MP-01), access (MP-02), marking (MP-03), storage (MP-04), transport (MP-05), sanitization (MP-06), use (MP-07). MP-08 (Media Downgrading) adds media downgrading procedures.
Gaps
Minimal gap.
A.7.11 Supporting utilities
A.7.12 Cabling security
A.7.13 Equipment maintenance
Rationale
MA family comprehensively covers maintenance: policy (MA-01), controlled maintenance (MA-02), tools (MA-03), nonlocal (MA-04), personnel (MA-05), timely (MA-06). MA-07 (Field Maintenance) adds controls for restricting field maintenance on critical components to trusted facilities.
Gaps
Minimal gap. MA-07 strengthens coverage for maintenance of critical equipment.
A.7.14 Secure disposal or re-use of equipment
Rationale
MP-06 covers media sanitization; MP-07 covers media use restrictions. PM-32 (Purposing) addresses analyzing systems and components for suitability for reuse, directly supporting secure re-use assessment.
Gaps
Minor: ISO includes all equipment disposal; SP 800-53 focuses on media specifically but PM-32 adds system/component reuse analysis.
A.8.1 User endpoint devices
Rationale
AC-19 covers access control for mobile devices; CM-07 least functionality; SC-28 protection at rest.
Gaps
ISO covers all user endpoint devices holistically (BYOD, MDM, containerization). SP 800-53 addresses mobile and device management across multiple controls but no unified endpoint control.
A.8.2 Privileged access rights 95%
Rationale
AC-06 directly covers least privilege including privileged access restriction, review, and authorization. Comprehensive coverage.
Gaps
Minimal gap.
Mapped Controls
A.8.3 Information access restriction
A.8.4 Access to source code
Rationale
CM-05 covers access restrictions for change; AC-03 access enforcement; SA-10 developer configuration management.
Gaps
Minor: ISO specifically addresses source code access restrictions. SP 800-53 addresses through configuration management and access controls.
A.8.5 Secure authentication
A.8.6 Capacity management
Rationale
AU-04 covers audit log storage capacity; SC-05 denial of service protection; CP-02 contingency planning considers capacity. SC-06 (Resource Availability) addresses resource allocation to prevent denial of service by ensuring sufficient processing capacity.
Gaps
ISO requires proactive capacity management for all IT resources. SP 800-53 addresses capacity in specific contexts but lacks a general capacity planning control. SC-06 partially fills the gap.
A.8.7 Protection against malware
A.8.8 Management of technical vulnerabilities
A.8.9 Configuration management
Rationale
CM family comprehensively covers configuration management: baselines (CM-02), change control (CM-03), analysis (CM-04), settings (CM-06), least functionality (CM-07). CM-14 (Signed Components) adds verification of digitally signed components before installation.
Gaps
Minimal gap.
A.8.10 Information deletion
Rationale
MP-06 media sanitization; SI-12 information management/retention. SR-12 (Component Disposal) addresses secure component disposal.
Gaps
ISO specifically addresses information deletion when no longer required. SP 800-53 covers sanitization and retention but proactive deletion based on business need less explicit.
A.8.11 Data masking
Rationale
SI-19 covers de-identification. PT-06/PT-07 cover data processing minimization.
Gaps
ISO specifically addresses data masking techniques (pseudonymization, anonymization, masking). SP 800-53 Rev 5 added privacy controls but masking as a technique is less comprehensively addressed.
A.8.12 Data leakage prevention
Rationale
AC-04 information flow enforcement; SC-07 boundary protection; SI-04 system monitoring; PE-19 information leakage.
Gaps
ISO specifically addresses DLP. SP 800-53 covers information flow and monitoring but integrated DLP as a concept is distributed across multiple controls.
A.8.13 Information backup
A.8.14 Redundancy of information processing facilities
A.8.15 Logging
Rationale
AU family comprehensively covers logging: events (AU-02), content (AU-03), storage (AU-04), response (AU-05), review (AU-06), reporting (AU-07), timestamps (AU-08), protection (AU-09), retention (AU-11).
Gaps
Minimal gap.
A.8.16 Monitoring activities
A.8.17 Clock synchronization 95%
Rationale
AU-08 directly covers time stamps and clock synchronization.
Gaps
Minimal gap.
Mapped Controls
A.8.18 Use of privileged utility programs
A.8.19 Installation of software on operational systems
Rationale
CM-05 access restrictions for change; CM-07 least functionality; CM-11 user-installed software; SA-22 unsupported components. CM-14 (Signed Components) prevents installation of unsigned software, strengthening installation controls.
Gaps
Minimal gap. CM-14 adds digital signature verification for software installation.
A.8.20 Networks security
Rationale
SC-07 boundary protection; SC-08 transmission confidentiality/integrity; AC-04 information flow. CA-09 (Internal System Connections) addresses authorization, documentation, and review of internal system connections, strengthening network security controls.
Gaps
Minimal gap. CA-09 adds internal connection authorization and documentation.
A.8.21 Security of network services
Rationale
SC-07/SC-08 cover network security. SA-09 covers external system services including network services.
Gaps
Minor: ISO requires security features, service levels, and management requirements for network services. Service level specifics less detailed in SP 800-53.
A.8.22 Segregation of networks
A.8.23 Web filtering
Rationale
SC-07 boundary protection includes filtering; SI-03 malware protection; AC-04 information flow.
Gaps
ISO specifically addresses web filtering. SP 800-53 doesn't have a dedicated web filtering control; addressed through general boundary and content controls.
A.8.24 Use of cryptography
A.8.25 Secure development life cycle
Rationale
SA-03 system development life cycle; SA-08 security engineering; SA-10 developer config management; SA-11 developer testing; SA-15 development process/standards; SA-17 developer security architecture.
Gaps
Minimal gap. SP 800-53 SA family is comprehensive for secure development.
A.8.26 Application security requirements
A.8.27 Secure system architecture and engineering principles
A.8.28 Secure coding
Rationale
SA-11 developer security testing; SA-15 development process standards; SA-16 developer-provided training; SA-17 security architecture.
Gaps
Minor: ISO specifically addresses secure coding practices. SP 800-53 addresses through development process and testing controls rather than explicit coding standards.
A.8.29 Security testing in development and acceptance
A.8.30 Outsourced development
Rationale
SA-04 acquisition requirements; SA-09 external system services; SA-10/SA-11 developer requirements apply to outsourced development.
Gaps
Minor: ISO specifically addresses outsourced development supervision and acceptance. SP 800-53 covers through general acquisition controls.
A.8.31 Separation of development, test and production environments
Rationale
CM-04 impact analysis (separate test environments); SA-11 developer testing environment; SC-32 system partitioning.
Gaps
Minor: ISO explicitly requires environment separation. SP 800-53 implies it through testing and partitioning controls but doesn't mandate specific environment separation.
A.8.32 Change management
A.8.33 Test information
A.8.34 Protection of information systems during audit testing
Rationale
CA-02 covers security assessments including audit considerations. AU-06 audit review analysis. CA-08 (Penetration Testing) addresses planning and execution of security testing with controls to protect systems during testing.
Gaps
ISO requires that audit testing be planned and agreed to minimize business disruption. SP 800-53 assessment controls don't explicitly address protection of systems during audit activities, but CA-08 adds planned penetration testing.
Methodology and Disclaimer
This coverage analysis maps from ISO 27001:2022 clauses/requirements back to NIST SP 800-53 Rev 5 controls, assessing how well the SP 800-53 control set addresses each framework requirement.
Coverage weighting represents an informed estimate based on control-objective alignment, not a definitive compliance determination. Weightings consider whether SP 800-53 controls address the intent of each framework requirement, even where terminology and structure differ.
This analysis should be validated by qualified assessors for use in compliance or audit activities. The authoritative source for any compliance determination is always the framework itself.