CVE-2026-56155
HIGH CISA KEV
ACT NOW
Priority: 0.03
BB Relevance:
41/100
Published: 2026-07-14
Modified: 2026-10-28
First seen: 2026-10-29
Status: active
Attack Surface
Low Complexity
No Interaction
Conf. Impact
Integ. Impact
CVSS Vector Breakdown
AV:
Local
AC:
Low
PR:
Low
UI:
None
S:
Unchanged
C:
High
I:
High
A:
High
Description
Microsoft Active Directory Federation Services contains an insufficient granularity of access control vulnerability that allows an authorized attacker to elevate privileges locally.
CISA Known Exploited Vulnerability
Vendor / Product
Microsoft — Active Directory Federation Services
Date Added
2026-07-14
Remediation Due
2026-07-28
https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2026-56155 ; BOD 26-04: https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk ; Forensics Triage Requirements: https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk ; https://nvd.nist.gov/vuln/detail/CVE-2026-56155; https://learn.microsoft.com/en-us/windows-server/identity/ad-fs/decommission/adfs-decommission-guide
Weakness Classification (1)
Affected Software (36)
Showing 30 of 36 entries
References & Advisories (2)
vendor-advisory
patch
US Government Resource