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CVE-2025-54094: Windows Defender Firewall Service Privilege Escalation

CVE-2025-54094 · published 1 year ago

Summary

An attacker with authorized access to the Windows Defender Firewall Service can exploit a vulnerability to gain elevated privileges on a local machine, potentially allowing them to install malware or make system changes. This affects Windows systems with the Windows Defender Firewall Service installed. Affected users should ensure the Windows Defender Firewall Service is properly configured and up-to-date.

What to do

Update microsoft windows_10_1507 to version 10.0.10240.21128 or later.
Update microsoft windows_10_1607 to version 10.0.14393.8422 or later.
Update microsoft windows_10_1809 to version 10.0.17763.7792 or later.
Update microsoft windows_10_21h2 to version 10.0.19044.6332 or later.
Update microsoft windows_10_22h2 to version 10.0.19045.6332 or later.
Update microsoft windows_11_22h2 to version 10.0.22621.5909 or later.
Update microsoft windows_11_23h2 to version 10.0.22631.5909 or later.
Update microsoft windows_11_24h2 to version 10.0.26100.6508 or later.
Update microsoft windows_server_2016 to version 10.0.14393.8422 or later.
Update microsoft windows_server_2019 to version 10.0.17763.7792 or later.
Update microsoft windows_server_2022 to version 10.0.20348.4106 or later.
Update microsoft windows_server_2022_23h2 to version 10.0.25398.1849 or later.
Update microsoft windows_server_2025 to version 10.0.26100.6508 or later.

Affected software

Vendor	Product	Affected versions
microsoft	windows_10_1507	< 10.0.10240.21128 `cpe:2.3:o:microsoft:windows_10_1507:::::::x64:*`
microsoft	windows_10_1607	< 10.0.14393.8422 `cpe:2.3:o:microsoft:windows_10_1607:::::::x64:*`
microsoft	windows_10_1809	< 10.0.17763.7792 `cpe:2.3:o:microsoft:windows_10_1809:::::::x64:*`
microsoft	windows_10_21h2	< 10.0.19044.6332 `cpe:2.3:o:microsoft:windows_10_21h2::::::::`
microsoft	windows_10_22h2	< 10.0.19045.6332 `cpe:2.3:o:microsoft:windows_10_22h2::::::::`
microsoft	windows_11_22h2	< 10.0.22621.5909 `cpe:2.3:o:microsoft:windows_11_22h2::::::::`
microsoft	windows_11_23h2	< 10.0.22631.5909 `cpe:2.3:o:microsoft:windows_11_23h2::::::::`
microsoft	windows_11_24h2	< 10.0.26100.6508 `cpe:2.3:o:microsoft:windows_11_24h2::::::::`
microsoft	windows_server_2008	r2 `cpe:2.3:o:microsoft:windows_server_2008:-:sp2:::::x64:*`
microsoft	windows_server_2012	r2 `cpe:2.3:o:microsoft:windows_server_2012:-:::::::*`
microsoft	windows_server_2016	< 10.0.14393.8422 `cpe:2.3:o:microsoft:windows_server_2016::::::::`
microsoft	windows_server_2019	< 10.0.17763.7792 `cpe:2.3:o:microsoft:windows_server_2019::::::::`
microsoft	windows_server_2022	< 10.0.20348.4106 `cpe:2.3:o:microsoft:windows_server_2022::::::::`
microsoft	windows_server_2022_23h2	< 10.0.25398.1849 `cpe:2.3:o:microsoft:windows_server_2022_23h2::::::::`
microsoft	windows_server_2025	< 10.0.26100.6508 `cpe:2.3:o:microsoft:windows_server_2025::::::::`

Original advisory text

Access of resource using incompatible type ('type confusion') in Windows Defender Firewall Service allows an authorized attacker to elevate privileges locally.

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-54094 Vendor Advisory

Fix within

Internet-facing 14 days

Internal At next upgrade

Not known to be exploited
Needs hands-on effort to exploit
Gives an attacker full control

Severity

6.7 Medium

Exploitation

<1% chance of attack within 30 days

Type

CWE-843Type Confusion

Timeline

Published9 Sep 2025

Updated4 Nov 2026

First seen7 Mar 2026

Sources

CVE-2025-54094 · NVD

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