Vulnerability in Microsoft Windows 11 24h2
CVE-2026-55144
Missing cryptographic step in Windows CryptoAPI allows an authorized attacker to perform tampering locally.
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.002 (12.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 12th percentile — 12.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000
Affected products
- Microsoft Windows 11 24h2
- Microsoft Windows 11 25h2
- Microsoft Windows 11 26h1
- 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 2022
- Microsoft Windows Server 2025 — versions 10.0.26100.0
- Microsoft Windows Server 2025
Weakness classification (CWE)
References
- Windows Cryptography API: Next Generation (CNG) Tampering Vulnerability (vendor-advisory, Patch, patch, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-55144?
- CVE-2026-55144 is a high-severity vulnerability in Microsoft Windows 11 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.