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Description

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

PUBLISHED Reserved 2024-12-05 | Published 2025-04-08 | Updated 2026-02-13 | Assigner microsoft




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

Problem types

CWE-59: Improper Link Resolution Before File Access ('Link Following')

Product status

10.0.10240.0 (custom) before 10.0.10240.20978
affected

10.0.14393.0 (custom) before 10.0.14393.7969
affected

10.0.17763.0 (custom) before 10.0.17763.7136
affected

10.0.19044.0 (custom) before 10.0.19044.5737
affected

10.0.19045.0 (custom) before 10.0.19045.5737
affected

10.0.22621.0 (custom) before 10.0.22621.5189
affected

10.0.22631.0 (custom) before 10.0.22631.5189
affected

10.0.22631.0 (custom) before 10.0.22631.5189
affected

10.0.26100.0 (custom) before 10.0.26100.3775
affected

6.1.7601.0 (custom) before 6.1.7601.27670
affected

6.1.7601.0 (custom) before 6.1.7601.27670
affected

6.0.6003.0 (custom) before 6.0.6003.23220
affected

6.0.6003.0 (custom) before 6.0.6003.23220
affected

6.2.9200.0 (custom) before 6.2.9200.25423
affected

6.2.9200.0 (custom) before 6.2.9200.25423
affected

6.3.9600.0 (custom) before 6.3.9600.22523
affected

6.3.9600.0 (custom) before 6.3.9600.22523
affected

10.0.14393.0 (custom) before 10.0.14393.7969
affected

10.0.14393.0 (custom) before 10.0.14393.7969
affected

10.0.17763.0 (custom) before 10.0.17763.7136
affected

10.0.17763.0 (custom) before 10.0.17763.7136
affected

10.0.20348.0 (custom) before 10.0.20348.3453
affected

10.0.25398.0 (custom) before 10.0.25398.1551
affected

10.0.26100.0 (custom) before 10.0.26100.3775
affected

10.0.26100.0 (custom) before 10.0.26100.3775
affected

References

www.vicarius.io/...ft-windows-update-stack-mitigation-script

www.vicarius.io/...oft-windows-update-stack-detection-script

msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21204 (Windows Process Activation Elevation of Privilege Vulnerability) vendor-advisory patch

cve.org (CVE-2025-21204)

nvd.nist.gov (CVE-2025-21204)

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