CVE-2025-26635
Windows Hello Security Feature Bypass Vulnerability
Weak authentication in Windows Hello allows an authorized attacker to bypass a security feature over a network.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- High
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
Windows Hello Security Feature Bypass Vulnerability
Weak authentication in Windows Hello allows an authorized attacker to bypass a security feature over a network.
- Record
CVE-2025-26635- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N/E:U/RL:O/RC:C - Weakness
- CWE-1390
- Updated
- 2026-11-02
EUVDEUVD-2025-10233
Weak authentication in Windows Hello allows an authorized attacker to bypass a security feature over a network.
- Record
EUVD-2025-10233- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N/E:U/RL:O/RC:C - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-cp6c-ff57-294g
Weak authentication in Windows Hello allows an authorized attacker to bypass a security feature...
Weak authentication in Windows Hello allows an authorized attacker to bypass a security feature over a network.
- Record
GHSA-cp6c-ff57-294g- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N - Weakness
- CWE-1390
- Updated
- 2026-11-02
NVD
Weak authentication in Windows Hello allows an authorized attacker to bypass a security feature over a network.
- Record
CVE-2025-26635- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N - Weakness
- CWE-1390
- Updated
- 2026-11-02
Affected products
- microsoft windows 10 version 1809
- microsoft windows 10 version 21h2
- microsoft windows 10 version 22h2
- microsoft windows 11 version 22h2
- microsoft windows 11 version 22h3
- microsoft windows 11 version 23h2
- microsoft windows server 2019
- microsoft windows server 2019 (server core installation)
- microsoft windows server 2022
- microsoft windows server 2022, 23h2 edition (server core installation)
- microsoft windows 10 1809
- microsoft windows 10 21h2
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2025-26635 is a medium vulnerability (CVSS 6.5) in Microsoft Windows 10 Version 1809, published April 8, 2025. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.53%, the 74th percentile. No source names a fixed version.