CVE-2026-55144: high-severity vulnerability in Microsoft Windows 11 Version 24H2
Windows Cryptography API: Next Generation (CNG) Tampering Vulnerability
Published · Updated
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21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7.1epss 0.2%
Missing cryptographic step in Windows CryptoAPI allows an authorized attacker to perform tampering locally.
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
Affected products
Microsoft · Windows 11 Version 24H2Microsoft · Windows 11 Version 25H2Microsoft · Windows 11 version 26H1Microsoft · Windows Server 2022Microsoft · Windows Server 2025Microsoft · Windows Server 2025 (Server Core installation)Related CVEs — Microsoft Windows 11 Version 24H2
In the same product, most dangerous first.
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