Vulnerability in Microsoft Windows 10 1809
CVE-2025-26635
Weak authentication in Windows Hello allows an authorized attacker to bypass a security feature over a network.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N.
EPSS exploit prediction
EPSS: 0.015 (72.9th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 73rd percentile — 72.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.015 · newest: 0.015 · change: 0.000
Affected products
- Microsoft Windows 10 1809
- Microsoft Windows 10 21h2
- Microsoft Windows 10 22h2
- 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
- Microsoft Windows 11 22h2
- Microsoft Windows 11 23h2
- Microsoft Windows 11 Version 22h2 — versions 10.0.22621.0
- Microsoft Windows 11 Version 22h3 — versions 10.0.22631.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- Windows Hello Security Feature Bypass Vulnerability (vendor-advisory, patch, Vendor Advisory)
Frequently asked questions
- What is CVE-2025-26635?
- CVE-2025-26635 is a medium-severity vulnerability in Microsoft Windows 10 1809, classified under Weak Authentication. CVSS score: 6.5/10. Published 2025-04-08.
- How severe is CVE-2025-26635?
- Medium severity. CVSS v3 base score is 6.5 out of 10.
- Is CVE-2025-26635 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.