CVE-2025-54109 Windows Defender Firewall Service Elevation of Privilege Vulnerability
An authorized local attacker can exploit a type confusion flaw in the Windows Defender Firewall Service to elevate privileges.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-54109?
CVE-2025-54109 is a medium-severity vulnerability in Microsoft Windows 10 1507, published on 9 Sep 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Access of resource using incompatible type ('type confusion') in Windows Defender Firewall Service allows an authorized attacker to elevate privileges locally.
Weakness: CWE-843
Which versions are affected by CVE-2025-54109?
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-2025-54109?
No fix has been published for CVE-2025-54109 yet. Limit exposure of the affected software until one is available.
Is CVE-2025-54109 being exploited?
There is no known exploitation of CVE-2025-54109 in the wild and no public exploit code.
Other vulnerabilities in Microsoft Windows 10 1507
- CVE-2017-8543 Microsoft Windows Search Remote Code Execution
- CVE-2025-33053 Microsoft Windows External Control of File Name or Path
- CVE-2025-33073 Microsoft Windows SMB Client Improper Access Control
- CVE-2024-49039 Microsoft Windows Task Scheduler Privilege Escalation
- CVE-2024-43461 Microsoft Windows MSHTML Platform Spoofing
Sources
Also known as GHSA-76q6-rq4j-jj95.