CVE-2026-56155

HIGH CVSS 7.8 View on NVD ↗

Description

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

CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected Products

microsoft/windows_10_1607 microsoft/windows_10_1809 microsoft/windows_server_2012 microsoft/windows_server_2016 microsoft/windows_server_2019 microsoft/windows_server_2022 microsoft/windows_server_2025

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-56155
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-56155

Published: Jul 14, 2026 17:17 UTC Modified: Jul 15, 2026 14:18 UTC