Microsoft’s Security Response Center has cataloged CVE-2025-54915 as an elevation-of-privilege vulnerability in the Windows Defender Firewall Service described as “Access of resource using incompatible type (‘type confusion’),” and the vendor advises that an authorized local attacker could...
CVE-2025-54109 Windows Defender Firewall Service Elevation of Privilege Vulnerability
Summary
What it is: CVE-2025-54109 is an elevation-of-privilege (EoP) vulnerability described by Microsoft as "Access of resource using incompatible type ('type confusion')" in the Windows Defender Firewall...
Microsoft’s security advisory for CVE-2025-54094 identifies a type‑confusion flaw in the Windows Defender Firewall Service that can be triggered by an authorized local actor to perform a local Elevation of Privilege (EoP) — in short, an attacker with the ability to run code as a non‑privileged...
application control
cve-2025-54094
defense in depth
edr
local attack
local eop
memory safety
mpssvc
msrc
patch management
privilege
privilege escalation
risk assessment
security advisory
type confusion
vulnerability
windows defender firewall
Microsoft’s Security Update Guide records CVE-2025-54104 as an elevation of privilege vulnerability in the Windows Defender Firewall Service caused by an “access of resource using incompatible type (‘type confusion’)” — in short, a type‑confusion bug in a privileged service that an authorized...
Microsoft’s Security Update Guide lists CVE-2025-53808 as an Elevation of Privilege vulnerability in the Windows Defender Firewall Service that stems from an “access of resource using incompatible type” (commonly called type confusion), and the vendor warns that a locally authorized attacker...
If Windows 11’s July 2025 cumulative update (KB5062553) won’t install on your PC and you’re seeing rollback messages or error codes such as 0x800f0922, 0x80073712, or “Updates failed — your device is missing important security updates,” this guide walks through a practical, evidence-backed...
We are in the process of upgrading endpoints in our environment to Windows 11. We have over 150 to do, with around 40 complete so far. Of the 40 we’ve done to date, we’ve have the following issue with 4 of them.
MPSSVC (Windows Defender Firewall Service) is ‘Running’ as intended before running...
Iv tried everything to get my firewall started I believe the problem started when my Anti virus free trail expired so I was without an Anti virus for a few days. Anyway I now have Avast anti virus installed and Spybot but when I check my firewall, windows update and windows security center they...
antivirus
bfe
chkdsk
community help
error message
firewall
managed services
mpssvc
pc security
registry
sfc
spybot
system issues
tech support
troubleshooting
windefend fix
windows security
windows update