• Blank Inetpub folder

    Posted on April 24, 2025 at 03:00 CDT by • Comment in the Forums

    The other day, Microsoft created the inetpub folder in the system drive as part of a mitigation protection for CVE-2025-21204. It applies to all versions of Windows. I spotted a news article about the proof of concept with an explanation from the security researcher.

    It’s an interesting read and includes some additional hardening suggestions if you think you might be at risk of attack.  The research recommends:

    Restrict ACLs on C:\ProgramData\Microsoft\UpdateStack

    I do not see this as a risk for consumers. It’s a risk for targeted businesses. For the vast majority of patchers, merely installing the update is good enough.

    It does reinforce something that my early testing did not reveal — if you accidentally remove the folder, it will be back again next month. Obviously, Microsoft wants it there for a reason.

    Windows Security , ,
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