What is CVE-2026-55144?

CVE-2026-55144 is a high-severity vulnerability in Microsoft Windows 11 Version 24h2, classified under Missing Cryptographic Step. CVSS score: 7.1/10. Published 2026-07-14.

How severe is CVE-2026-55144?

High severity. CVSS v3 base score is 7.1 out of 10.

Vulnerability in Microsoft Windows 11 Version 24h2

CVE-2026-55144

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

CVSS v3 metric

CVSS v3 base score 7.1 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N.

Affected products

Microsoft Windows 11 Version 24h2 — versions 10.0.26100.0
Microsoft Windows 11 Version 25h2 — versions 10.0.26200.0
Microsoft Windows 11 Version 26h1 — versions 10.0.28000.0
Microsoft Windows Server 2022 — versions 10.0.20348.0
Microsoft Windows Server 2025 — versions 10.0.26100.0
Microsoft Windows Server 2025 (Server Core Installation) — versions 10.0.26100.0

Weakness classification (CWE)

CWE-325 — Missing Cryptographic Step

References

secure@microsoft.com (vendor-advisory, patch)

Frequently asked questions

What is CVE-2026-55144?: CVE-2026-55144 is a high-severity vulnerability in Microsoft Windows 11 Version 24h2, classified under Missing Cryptographic Step. CVSS score: 7.1/10. Published 2026-07-14.
How severe is CVE-2026-55144?: High severity. CVSS v3 base score is 7.1 out of 10.