Cyber Resilience

NIST 800-53 r5 · Controls catalogue · Family SC

SC-3Security Function Isolation

Isolate security functions from nonsecurity functions.

Last updated: 22 August 2026 07:11 UTC

Implementations targeting this control (0)

ATT&CK techniques this control mitigates (18)

Weaknesses this control addresses (6)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-284Improper Access Control6,900+By design the control implements a hard boundary that prevents unauthorized actors or non-security functions from reaching security-critical resources or entry points.
CWE-269Improper Privilege Management3,400+The control enforces separation so that privilege management decisions and operations for security functions cannot be influenced or subverted by non-security code.
CWE-732Incorrect Permission Assignment for Critical Resource1,900+Security functions become critical resources whose permissions can be assigned narrowly and independently of the rest of the system.
CWE-250Execution with Unnecessary Privileges300+Isolating security functions allows them to execute with only the privileges they require while preventing non-security code from inheriting or accessing those privileges.
CWE-1220Insufficient Granularity of Access Control100+Isolation supplies an explicit, enforceable granularity boundary between security and non-security functions that coarser access-control schemes lack.
CWE-653Improper Isolation or Compartmentalization73The control directly supplies the compartmentalization that CWE-653 requires between security and non-security domains.

Top CVEs where this control is the strongest mitigation

CVE Risk CVSS EPSS Match
CVE-2025-1974 9.99.80.9952good
CVE-2026-43997 7.610.00.0098good
CVE-2025-21590 KEV 7.54.40.0171good
CVE-2024-33768 7.49.80.0085good
CVE-2026-4692 7.410.00.0049good
CVE-2026-44005 7.410.00.0083good
CVE-2026-534217.49.80.0068good
CVE-2026-534057.39.80.0044good
CVE-2026-630717.39.80.0044good
CVE-2026-0542 7.09.20.0062good
CVE-2025-4083 6.89.10.0043good
CVE-2025-57738 6.87.20.2311good
CVE-2026-12297 6.79.60.0039good
CVE-2025-5476 6.58.80.0031good
CVE-2025-12805 6.18.10.0038good
CVE-2026-157386.08.50.0037good
CVE-2024-23682 5.88.20.0035good
CVE-2024-23683 5.88.20.0036good
CVE-2024-47520 5.87.60.0041good
CVE-2025-342015.87.80.0029good
CVE-2024-0135 5.77.60.0111good
CVE-2026-4282 5.77.40.0043good
CVE-2024-0136 5.67.60.0067good
CVE-2025-53710 5.67.50.0027good
CVE-2025-3086 5.57.10.0040good

Other controls in family SC

SC-1 SC-10 SC-11 SC-12 SC-13 SC-14 SC-15 SC-16 SC-17 SC-18 SC-19 SC-2 SC-20 SC-21 SC-22 SC-23 SC-24 SC-25 SC-26 SC-27 SC-28 SC-29 SC-30 SC-31 SC-32 SC-33 SC-34 SC-35 SC-36 SC-37 SC-38 SC-39 SC-4 SC-40 SC-41 SC-42 SC-43 SC-44 SC-45 SC-46 SC-47 SC-48 SC-49 SC-5 SC-50 SC-51 SC-6 SC-7 SC-8 SC-9