Auth bypass in Microsoft Windows 10 1507
CVE-2025-54918
Improper authentication in Windows NTLM allows an authorized attacker to elevate privileges over a network.
Vulnerability class: Broken Authentication
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.198 (97.3th percentile), scored .
Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 97th percentile — 97.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.194 · newest: 0.198 · change: +0.004
Affected products
- Microsoft Windows 10 1507
- Microsoft Windows 10 1607
- Microsoft Windows 10 1809
- Microsoft Windows 10 21h2
- Microsoft Windows 10 22h2
- Microsoft Windows 10 Version 1507 — versions 10.0.10240.0
- Microsoft Windows 10 Version 1607 — versions 10.0.14393.0
- Microsoft Windows 10 Version 1809 — versions 10.0.17763.0
- Microsoft Windows 10 Version 21h2 — versions 10.0.19044.0
- Microsoft Windows 10 Version 22h2 — versions 10.0.19045.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- msrc.microsoft.com/update-guide/vulnerability/CVE-2025-54918 (vendor-advisory, patch, Vendor Advisory)
Frequently asked questions
- What is CVE-2025-54918?
- CVE-2025-54918 is a high-severity vulnerability in Microsoft Windows 10 1507, classified under Improper Authentication. CVSS score: 8.8/10. Published 2025-09-09.
- How severe is CVE-2025-54918?
- High severity. CVSS v3 base score is 8.8 out of 10.
- Is CVE-2025-54918 known to be exploited?
- 7 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.