Microsoft has published an advisory identifying CVE-2025-55317, a local elevation-of-privilege flaw in Microsoft AutoUpdate (MAU) caused by improper link resolution before file access — commonly described as a link-following or symlink/junction weakness — that can allow an authorized local...
cve-2025-55317
cybersecurity
endpoint security
hardening
link following
local exploit
macos
mau
microsoft autoupdate
msrc
patch management
privilege
privilege escalation
reparse point
security advisory
symlinks
threat detection
update agent
vulnerability
The Mysterious “inetpub” Folder: An Unexpected Windows 11 Quirk
Windows 11 users have recently encountered an unexpected twist following the cumulative update KB5055523—a seemingly innocuous yet puzzling folder named “inetpub” appearing on the C drive. This odd discovery, highlighted by multiple...
24h2 update
access control
active exploits
administration tips
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administrator guide
april 2025 update
april update
attack vector
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configuration
cve-2025-21204
cybersecurity
defense in depth
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directory junction exploit
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filesystem permissions
firewall
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folder restoration
guidance
human error
iis
inetpub
inetpub folder
internet information services
it administration
it management
junction exploit
junction points
kb5055523
local exploit
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maintenance
malware
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microsoft
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network security
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Here is a summary of the original Petri article on the Windows 11 'inetpub' folder security risk:
What happened?
After the April 2025 Patch Tuesday update, a new "inetpub" folder started appearing on Windows 10 and 11 machines.
Microsoft created this folder to help patch a bug (CVE-2025-21204)...
administrative permissions
cve-2025-21204
cyberattack prevention
cybersecurity
cybersecurity best practices
directory junctions
endpoint security
extended security updates
file security
folder permissions
iis
inetpub folder
insider threats
it admin tips
itprotection
junction points
local exploit
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microsoft
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microsoft patch
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update management
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vulnerability
windows 10
windows 11
windows defender
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windows servicing
windows system folder
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windows update
windows update risks
windows vulnerabilities
The inetpub folder has recently become the center of an intriguing and somewhat ironic security controversy in Windows 11, particularly after the April 2025 cumulative update. This seemingly innocuous and empty system folder, traditionally associated with Microsoft's Internet Information...
cybersecurity
directory junctions
inetpub folder
junction exploit
microsoft patch
permission management
security
security best practices
security research
security updates
symbolic links
symlinks
sysadmin tips
system administration
update sabotage
vulnerability
windows 11
windows security
windows update
windows vulnerabilities
Microsoft’s Mystery inetpub Folder: When the Fix Becomes a Flaw
At the heart of the latest chapter in Windows patching is a familiar folder with an unfamiliar twist—c:\inetpub. The recent kerfuffle that has swept Windows administrators into a maelstrom of head-scratching and risk analysis...
admin security
cve-2025-21204
denial of service
exploit prevention
file security
iis
inetpub
junctions
malicious redirects
microsoft
ntfs
patch failures
patch management
privilege escalation
security best practices
security research
symlinks
vulnerabilities
windows security
windows update
Windows users stared at their C: drives in dismay after April 2025’s Patch Tuesday, only to find a mysterious, empty new folder named “inetpub” lurking at the root of their systems—like some digital tumbleweed blown in by a particularly secretive Microsoft update.
The Folder That Raised...
cve-2025-21204
exploit prevention
inetpub folder
microsoft patch
patch management
privilege escalation
security
security awareness
security flaw
security research
symlinks
sysadmin
sysadmin tips
windows 2025
windows bugs
windows security
windows update
windows vulnerabilities
Hi,
I'm using two win10 PCs (a Pro and a Home).
I just built some symlinks in different folders to a target folder mp4 files.
Now I have some time to copy these symlinks to my Notebook without having to build all of the symlinks again.
That means that the target, which is visible on any of the...
Overview
Symlinks, or symbolic links, are “virtual” files or folders which reference a physical file or folder located elsewhere, and are an important feature built in to many operating systems, including Linux and Windows.
The Windows’ NTFS file system has supported symlinks since Windows...
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windows 10
windows vista
I have had this issue several times although have only just worked out the cause.
I am running windows 7 with the system drive on an SSD drive. During install I created several Symlink directories to relocate them onto the large HDD.
Out of nowhere (i know), some application stop...
On almost every version of the "Microsoft Lifecam" web camera, there is a call button on the device. The device is usually very small, and upon hitting the call button, you will have a program launched over and over again, in quite an annoying fashion, which can never be closed, called...
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device issues
icepick
installation
lifecam
messenger
microsoft
program files
skype
software bugs
symbolic links
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task manager
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windows
I'm trying to set up a development environment at work. I'm the only one using Windows. Others have the environment set up on Linux and Mac. I'm hoping this is possible but I'm stuck on one particular issue that is driving me crazy!
I need to connect to a shared network drive via NFS. I...
access issues
administrator
development
error
file sharing
home office
jungle disk
local security
mapped drives
mklink
network drive
nfs
permissions
privilege
symlinks
troubleshooting
uac
windows 7
windows settings
I've writen some scripts to change the C:\user to an other partition.
all seems to work but I can not change the security on the SYMBLINK and Junctions (not the directories)
assuming all in c:\users\%USERNAME% is machine independent ...
All data will be recreated at first login anyhow...
directory
environment variables
junctions
mklink
partition
permissions
registry
roaming
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script execution
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symlinks
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windows 7
workgroup
xcacls
Is there a way to create symlinks in Windows 7?
I've got several external hard drives for Media, etc and all and I want to symlink them to the folders in my user's folder. Is there a way to do that? For those who don't know what symlinks are, it's a linux thing, just hoping there's a similar...