CVE-2026-56155

high Microsoft ⚠️ CISA KEV — Exploited in the Wild
CVSS v3 Base Score
7.8
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C
Attack Characteristics
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Confidentiality
High
Integrity
High
Availability
High
Published: July 14, 2026 (54 days ago)
Last Modified: July 15, 2026
Vendor: Microsoft
Source: MITRE

⚠️ CISA Known Exploited Vulnerability

Added to KEV: 2026-07-14
Remediation Due: 2026-07-28 (⚠ 41d overdue)

Description

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

CWE

CWE-1220

Affected Products

Microsoft Windows 10 Version 1607Microsoft Windows 10 Version 1809Microsoft Windows Server 2012Microsoft Windows Server 2012 (Server Core installation)Microsoft Windows Server 2012 R2Microsoft Windows Server 2012 R2 (Server Core installation)Microsoft Windows Server 2016Microsoft Windows Server 2016 (Server Core installation)Microsoft Windows Server 2019Microsoft Windows Server 2019 (Server Core installation)

References

🔗 msrc.microsoft.com