CVE-2025-54109
MEDIUMCVSS 6.7/10EPSS 0.45%
Last modified
CVE-2025-54109 is a medium-severity vulnerability rated 6.7/10 on the CVSS scale. Access of resource using incompatible type ('type confusion') in Windows Defender Firewall Service allows an authorized attacker to elevate privileges locally.. EPSS estimates a 0.45% chance of exploitation in the next 30 days.
Description
Access of resource using incompatible type ('type confusion') in Windows Defender Firewall Service allows an authorized attacker to elevate privileges locally.
Metrics
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions | Update |
|---|---|---|---|
| Microsoft | Windows 10 1507 | < 10.0.10240.21128 | — |
| Microsoft | Windows 10 1607 | < 10.0.14393.8422 | — |
| Microsoft | Windows 10 1809 | < 10.0.17763.7792 | — |
| Microsoft | Windows 10 21h2 | < 10.0.19044.6332 | — |
| Microsoft | Windows 10 22h2 | < 10.0.19045.6332 | — |
| Microsoft | Windows 11 22h2 | < 10.0.22621.5909 | — |
| Microsoft | Windows 11 23h2 | < 10.0.22631.5909 | — |
| Microsoft | Windows 11 24h2 | < 10.0.26100.6508 | — |
| Microsoft | Windows Server 2008 | All versions | Sp2 |
| Microsoft | Windows Server 2008 | r2 | Sp1 |
| Microsoft | Windows Server 2012 | All versions | — |
| Microsoft | Windows Server 2012 | r2 | — |
| Microsoft | Windows Server 2016 | < 10.0.14393.8422 | — |
| Microsoft | Windows Server 2019 | < 10.0.17763.7792 | — |
| Microsoft | Windows Server 2022 | < 10.0.20348.4106 | — |
| Microsoft | Windows Server 2022 23h2 | < 10.0.25398.1849 | — |
| Microsoft | Windows Server 2025 | < 10.0.26100.6508 | — |
References
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
What is CVE-2025-54109?
Access of resource using incompatible type ('type confusion') in Windows Defender Firewall Service allows an authorized attacker to elevate privileges locally.
How severe is CVE-2025-54109?
CVE-2025-54109 has a CVSS score of 6.7/10 (MEDIUM severity). The EPSS model estimates a 0.45% probability of exploitation in the next 30 days.
How do I fix CVE-2025-54109?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2025
- CVE-2025-54103Use after free in Windows Management Services allows an unau…7.4
- CVE-2025-54104Access of resource using incompatible type ('type confusion'…6.7
- CVE-2025-54105Concurrent execution using shared resource with improper syn…7
- CVE-2025-54106Integer overflow or wraparound in Windows Routing and Remote…8.8
- CVE-2025-54107Improper resolution of path equivalence in Windows MapUrlToZ…4.3
- CVE-2025-54108Concurrent execution using shared resource with improper syn…7
- CVE-2025-5411A vulnerability was found in Mist Community Edition up to 4.…5.4
- CVE-2025-54110Integer overflow or wraparound in Windows Kernel allows an a…8.8
- CVE-2025-54111Use after free in Windows UI XAML Phone DatePickerFlyout all…7.8
- CVE-2025-54112Use after free in Microsoft Virtual Hard Drive allows an aut…7
- CVE-2025-54113Heap-based buffer overflow in Windows Routing and Remote Acc…8.8
- CVE-2025-54114Concurrent execution using shared resource with improper syn…7
Are you affected by CVE-2025-54109?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST