CVE-2026-56155

Summary

Insufficient granularity of access control in Active Directory Federation Services (AD FS) allows an authorized attacker to elevate privileges locally.

Affected Software

VendorProductVersion RangeStatus
MicrosoftWindows 10 Version 160710.0.14393.0 < 10.0.14393.9339affected
MicrosoftWindows 10 Version 180910.0.17763.0 < 10.0.17763.9020affected
MicrosoftWindows Server 20126.2.9200.0 < 6.2.9200.26226affected
MicrosoftWindows Server 2012 (Server Core installation)6.2.9200.0 < 6.2.9200.26226affected
MicrosoftWindows Server 2012 R26.3.9600.0 < 6.3.9600.23291affected
MicrosoftWindows Server 2012 R2 (Server Core installation)6.3.9600.0 < 6.3.9600.23291affected
MicrosoftWindows Server 201610.0.14393.0 < 10.0.14393.9339affected
MicrosoftWindows Server 2016 (Server Core installation)10.0.14393.0 < 10.0.14393.9339affected
MicrosoftWindows Server 201910.0.17763.0 < 10.0.17763.9020affected
MicrosoftWindows Server 2019 (Server Core installation)10.0.17763.0 < 10.0.17763.9020affected
MicrosoftWindows Server 202210.0.20348.0 < 10.0.20348.5386affected
MicrosoftWindows Server 202510.0.26100.0 < 10.0.26100.33158affected
MicrosoftWindows Server 2025 (Server Core installation)10.0.26100.0 < 10.0.26100.33158affected

Weaknesses

  • CWE-1220: CWE-1220: Insufficient Granularity of Access Control

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: active
    • Automatable: no
    • Technical Impact: total

Additional References

References