CVE-2025-26635 Windows Hello Security Feature Bypass Vulnerability
An authorized attacker can bypass Windows Hello security features over a network due to weak authentication mechanisms.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-26635?
CVE-2025-26635 is a medium-severity vulnerability in Microsoft Windows 10 1809, published on 8 Apr 2025. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
Weak authentication in Windows Hello allows an authorized attacker to bypass a security feature over a network.
Weakness: CWE-1390
Which versions are affected by CVE-2025-26635?
It affects 8 products.
Products include Microsoft Windows 10 1809, Microsoft Windows 10 21h2, Microsoft Windows 10 22h2, Microsoft Windows 11 22h2, Microsoft Windows 11 23h2, Microsoft Windows Server 2019 and 2 more.
How do I fix CVE-2025-26635?
No fix has been published for CVE-2025-26635 yet. Limit exposure of the affected software until one is available.
Is CVE-2025-26635 being exploited?
There is no known exploitation of CVE-2025-26635 in the wild and no public exploit code.
Other vulnerabilities in Microsoft Windows 10 1809
- CVE-2024-29988 Microsoft SmartScreen Prompt Security Feature Bypass
- CVE-2024-21412 Microsoft Windows Internet Shortcut Files Security Feature Bypass
- CVE-2025-62221 Microsoft Windows Use After Free
- CVE-2025-30400 Microsoft Windows DWM Core Library Use-After-Free
- CVE-2024-21338 Microsoft Windows Kernel Exposed IOCTL with Insufficient Access Control
Sources
Also known as GHSA-cp6c-ff57-294g.