Cyber Resilience

NIST 800-53 r5 · Controls catalogue · Family AC

AC-4Information Flow Enforcement

Enforce approved authorizations for controlling the flow of information within the system and between connected systems based on {{ insert: param, ac-04_odp }}.

Last updated: 22 August 2026 07:11 UTC

Implementations targeting this control (5)

ATT&CK techniques this control mitigates (158)

Weaknesses this control addresses (8)AI-assisted

CWEs ranked by how often they appear in real CVEs. The rationale describes how this control reduces exploitability of each weakness class.

CWE Name CVEs Why this control addresses it
CWE-862Missing Authorization10,200+Mandates authorization checks and enforcement for all information flows, addressing missing authorization.
CWE-284Improper Access Control6,900+Enforcing approved authorizations for information flows directly implements access control over data movements within and between systems.
CWE-863Incorrect Authorization3,900+Applies only approved authorizations to information flows, mitigating incorrect authorization decisions.
CWE-285Improper Authorization1,500+Requires and applies authorization decisions specifically to control information flows based on policy.
CWE-668Exposure of Resource to Wrong Sphere800+Restricts information flows to ensure resources are not exposed to incorrect or unauthorized spheres.
CWE-669Incorrect Resource Transfer Between Spheres100+Enforces proper authorization rules for any resource or data transfer between different spheres.
CWE-653Improper Isolation or Compartmentalization73Maintains isolation and compartmentalization by restricting flows between security domains or levels.
CWE-501Trust Boundary Violation33Prevents information from crossing trust boundaries without explicit approved authorizations.

Top CVEs where this control is the strongest mitigation

CVE Risk CVSS EPSS Match
CVE-2026-15409 KEV10.010.00.7422good
CVE-2024-45507 9.99.80.9323good
CVE-2023-49785 9.49.10.8316good
CVE-2026-64849 KEV9.39.30.0815good
CVE-2025-30220 9.29.90.5672good
CVE-2025-34291 KEV 9.28.80.8384good
CVE-2024-23898 9.08.80.6715good
CVE-2024-21893 KEV 8.98.21.0000good
CVE-2026-20230 KEV 8.88.60.8321good
CVE-2024-32964 8.59.00.5296good
CVE-2025-2828 8.510.00.1588good
CVE-2026-31431 KEV 8.57.80.9991good
CVE-2024-38472 8.37.50.6947good
CVE-2025-27817 8.37.50.6527good
CVE-2024-4325 8.08.60.3737good
CVE-2024-54819 8.09.10.1803good
CVE-2025-54381 8.09.90.1246good
CVE-2026-44578 8.08.60.3887good
CVE-2025-21385 7.98.80.2444good
CVE-2024-41570 7.89.80.0291good
CVE-2024-47008 7.87.50.4706good
CVE-2024-45518 7.88.80.2018good
CVE-2025-22952 7.89.80.0285good
CVE-2026-336267.87.50.4525good
CVE-2023-42282 7.69.80.0161good

Other controls in family AC

AC-1 AC-10 AC-11 AC-12 AC-13 AC-14 AC-15 AC-16 AC-17 AC-18 AC-19 AC-2 AC-20 AC-21 AC-22 AC-23 AC-24 AC-25 AC-3 AC-5 AC-6 AC-7 AC-8 AC-9