Description

Improper link resolution before file access ('link following') in Windows Update Stack allows an authorized attacker to elevate privileges locally.

Related CPE's

o

microsoft

windows_10_1507

2

o

microsoft

windows_10_1607

2

o

microsoft

windows_10_1809

2

o

microsoft

windows_10_21h2

Vulnerable

o

microsoft

windows_10_22h2

Vulnerable

o

microsoft

windows_11_22h2

Vulnerable

o

microsoft

windows_11_23h2

Vulnerable

o

microsoft

windows_11_24h2

Vulnerable

o

microsoft

windows_server_2008

3

o

microsoft

windows_server_2012

2

o

microsoft

windows_server_2016

Vulnerable

o

microsoft

windows_server_2019

Vulnerable

o

microsoft

windows_server_2022

Vulnerable

o

microsoft

windows_server_2022_23h2

Vulnerable

o

microsoft

windows_server_2025

Vulnerable

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21204

Vendor Advisory

https://www.vicarius.io/vsociety/posts/cve-2025-21204-privilege-elevation-vulnerability-in-microsoft-windows-update-stack-detection-script

Tool Signature

https://www.vicarius.io/vsociety/posts/cve-2025-21204-privilege-elevation-vulnerability-in-microsoft-windows-update-stack-mitigation-script

Mitigation

Weaknesses

[email protected]

Secondary
CWE-59

CVSS impact metrics

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

7.8 · High

Information

Source identifier

[email protected]

Vulnerability status

Analyzed

Published

2025-04-08T16:15:45.343Z

11 months ago

Last modified

2025-07-09T14:41:26.600Z

8 months ago