Integer overflow in Windows and Windows Server - CVE-2026-54115
Published: July 17, 2026
Vulnerability identifier: #VU138094
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-54115
CWE-ID: CWE-190
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Microsoft
Affected software:
Windows
Windows Server
Windows
Windows Server
Detailed vulnerability description
The vulnerability allows a local user to escalate privileges.
The vulnerability exists due to integer overflow or wraparound in Windows Active Directory when processing crafted local input. A local user can trigger the integer overflow to escalate privileges.
The attacker would gain the rights of the user that is running the affected application.
How to mitigate CVE-2026-54115
Install security update from vendor's website.