CVE-2026-55144

HIGH

Windows Cryptography API: Next Generation (CNG) Tampering Vulnerability

Title source: cna
STIX 2.1

Description

Missing cryptographic step in Windows CryptoAPI allows an authorized attacker to perform tampering locally.

References (1)

Core 1
Core References
Vendor Advisory vendor-advisory patch
Windows Cryptography API: Next Generation (CNG) Tampering Vulnerability
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-55144

Scores

CVSS v3 7.1
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N/E:U/RL:O/RC:C

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact total

Details

CWE
CWE-325
Status published
Products (6)
Microsoft/Windows 11 Version 24H2 10.0.26100.0 - 10.0.26100.8875
Microsoft/Windows 11 Version 25H2 10.0.26200.0 - 10.0.26200.8875
Microsoft/Windows 11 version 26H1 10.0.28000.0 - 10.0.28000.2525
Microsoft/Windows Server 2022 10.0.20348.0 - 10.0.20348.5386
Microsoft/Windows Server 2025 10.0.26100.0 - 10.0.26100.33158
Microsoft/Windows Server 2025 (Server Core installation) 10.0.26100.0 - 10.0.26100.33158
Published Jul 14, 2026
Tracked Since Jul 14, 2026