CVE-2025-21369 Microsoft Digest Authentication Remote Code Execution Vulnerability

High 8.8 Published Updated

An integer overflow in Microsoft Digest Authentication allows remote attackers to execute arbitrary code on affected Windows systems.

Exploited in the wild
Not known
Login needed
Any signed-in user
Attackable
Over the internet
Victim action needed
Not needed
Fix
None listed

What is CVE-2025-21369?

CVE-2025-21369 is a high-severity vulnerability in Microsoft Windows 10 1507, published on 11 Feb 2025. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

Microsoft Digest Authentication Remote Code Execution Vulnerability

Weakness: CWE-190, CWE-122

Which versions are affected by CVE-2025-21369?

It affects 15 products.

Products include Microsoft Windows 10 1507, Microsoft Windows 10 1607, Microsoft Windows 10 1809, Microsoft Windows 10 21h2, Microsoft Windows 10 22h2, Microsoft Windows 11 22h2 and 9 more.

How do I fix CVE-2025-21369?

No fix has been published for CVE-2025-21369 yet. Limit exposure of the affected software until one is available.

Is CVE-2025-21369 being exploited?

There is no known exploitation of CVE-2025-21369 in the wild and no public exploit code.

All Microsoft Windows 10 1507 vulnerabilities

Sources

Also known as GHSA-25h6-xmmh-34gc.

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