CVE-2025-21204
Windows Update Stack Local Privilege Escalation Vulnerability
Description
Improper link resolution before file access ('link following') in Windows Update Stack allows an authorized attacker to elevate privileges locally.
INFO
Published Date :
April 8, 2025, 6:15 p.m.
Last Modified :
April 9, 2025, 8:03 p.m.
Source :
[email protected]
Remotely Exploitable :
No
Impact Score :
5.9
Exploitability Score :
1.8
Public PoC/Exploit Available at Github
CVE-2025-21204 has a 5 public PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
Affected Products
The following products are affected by CVE-2025-21204
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2025-21204.
| URL | Resource |
|---|---|
| https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21204 |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Restore the integrity of the parent 'inetpub' folder following security implications highlighted by CVE-2025-21204.
PowerShell
None
Python
List for some of my cves
exploits and proof-of-concept vulnerability demonstration files from the team at Hacker House
Python C Shell Perl HTML C++
爬取secwiki和xuanwu.github.io/sec.today,分析安全信息站点、安全趋势、提取安全工作者账号(twitter,weixin,github等)
Python HTML
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2025-21204 vulnerability anywhere in the article.
-
Cyber Security News
Weekly Cyber Security News Letter – Last Week’s Top Cyber Attacks & Vulnerabilities
In today’s hyper-connected world, cyber threats are evolving at breakneck speed, making it more crucial than ever to stay informed and vigilant. Each week, our newsletter delivers a curated roundup of ... Read more
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BleepingComputer
Windows "inetpub" security fix can be abused to block future updates
A recent Windows security update that creates an ‘inetpub’ folder has introduced a new weakness allowing attackers to prevent the installation of future updates. After people installed this month's Mi ... Read more
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The Register
Microsoft mystery folder fix might need a fix of its own
Turns out Microsoft's latest patch job might need a patch of its own, again. This time, the culprit is a mysterious inetpub folder quietly deployed by Redmond, now hijacked by a security researcher to ... Read more
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Cyber Security News
Critical Windows Update Stack Vulnerability Allows Code Execution & Privilege Escalation
A security flaw has been identified in the Windows Update Stack, exposing millions of Windows systems to the risk of unauthorized code execution and privilege escalation. Tracked as CVE-2025-21204, th ... Read more
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Daily CyberSecurity
CVE-2025-21204: SYSTEM-Level Privilege Escalation in Windows Update Stack Exposed, PoC Released
Image: Elli Shlomo Security researcher Elli Shlomo published the technical details and a proof-of-concept exploit code for CVE-2025-21204, a severe local privilege escalation flaw within the Windows U ... Read more
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Cyber Security News
Microsoft Asks Windows 11 Users Not to Delete Mysterious “inetpub” Folder
A seemingly empty folder appearing on Windows systems after recent security updates has raised concerns among users, but Microsoft confirms it’s an intentional security measure that should remain unto ... Read more
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The Register
Don't delete that mystery empty folder. Windows put it there as a security fix
Canny Windows users who've spotted a mysterious folder on hard drives after applying last week's security patches for the operating system can rest assured – it's perfectly benign. In fact, it's recom ... Read more
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security.nl
Microsoft adviseert Windowsgebruikers inetpub-map niet te verwijderen
Microsoft adviseert Windowsgebruikers om een map genaamd 'inetpub' niet te verwijderen. De map wordt aangemaakt na de installatie van een beveiligingsupdate voor een kwetsbaarheid aangeduid als CVE-20 ... Read more
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BleepingComputer
Microsoft: Windows 'inetpub' folder created by security fix, don’t delete
Microsoft has now confirmed that an April 2025 Windows security update is creating a new empty "inetpub" folder and warned users not to delete it. This folder is typically used by Microsoft's Internet ... Read more
The following table lists the changes that have been made to the
CVE-2025-21204 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
New CVE Received by [email protected]
Apr. 08, 2025
Action Type Old Value New Value Added Description Improper link resolution before file access ('link following') in Windows Update Stack allows an authorized attacker to elevate privileges locally. Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Added CWE CWE-59 Added Reference https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21204
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2025-21204 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2025-21204
weaknesses.