CVE-2025-21204

HIGH
Published Apr 8, 2025 Modified Jul 9, 2025 CWE-59

Description

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

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CVSS v3.1 Score

7.8
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weakness Type (CWE)

CWE-59 CWE-59

Affected Products

Vendor Product
microsoft windows_10_1507
microsoft windows_10_1507
microsoft windows_10_1607
microsoft windows_10_1607
microsoft windows_10_1809
microsoft windows_10_1809
microsoft windows_10_21h2
microsoft windows_10_22h2
microsoft windows_11_22h2
microsoft windows_11_23h2
microsoft windows_11_24h2
microsoft windows_server_2008
microsoft windows_server_2008
microsoft windows_server_2008
microsoft windows_server_2012
microsoft windows_server_2012
microsoft windows_server_2016
microsoft windows_server_2019
microsoft windows_server_2022
microsoft windows_server_2022_23h2
microsoft windows_server_2025

References

Frequently Asked Questions

What is CVE-2025-21204? +
Improper link resolution before file access ('link following') in Windows Update Stack allows an authorized attacker to elevate privileges locally. It has a CVSS v3.1 base score of 7.8 (HIGH).
How severe is CVE-2025-21204? +
CVE-2025-21204 has a CVSS v3.1 score of 7.8 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.
What products are affected by CVE-2025-21204? +
CVE-2025-21204 affects products from microsoft, specifically: windows_10_1507, windows_10_1607, windows_10_1809, windows_10_21h2, windows_10_22h2, windows_11_22h2, windows_11_23h2, windows_11_24h2, windows_server_2008, windows_server_2012, windows_server_2016, windows_server_2019, windows_server_2022, windows_server_2022_23h2, windows_server_2025. Check the affected products table above for specific version ranges.
How do I check if I'm vulnerable to CVE-2025-21204? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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