Main Vulnerability Database Vulnerabilities #VU137946

Missing Required Cryptographic Step in Microsoft Windows and Windows Server - CVE-2026-55144

Published: July 17, 2026

Vulnerability identifier: #VU137946

CSH Severity: Low

CVSS v4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-55144

CWE-ID: CWE-325

Exploitation vector: Local access

Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a local user to perform tampering.

The vulnerability exists due to a missing cryptographic step in Windows CryptoAPI when processing cryptographic operations locally. A local user can invoke the vulnerable functionality to perform tampering.

Affected software

Microsoft Windows
Windows Server

How to mitigate CVE-2026-55144

Install security update from vendor's website.

Microsoft Windows - addressed in versions 11 24H2 10.0.26100.8875, 11 25H2 10.0.26200.8875, 11 26H1 10.0.28000.2525
Windows Server - addressed in versions 2012 R2 6.3.9600.23291, 2022 10.0.20348.5386, 2025 10.0.26100.33158

External References

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2026-55144

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