CVE-2025-21391MicrosoftOperating systemsFebruary 11, 2025

Microsoft Windows Storage Link Following Vulnerability

High 7.1Actively exploited

Description

Microsoft Windows Storage contains a link following vulnerability that could allow for privilege escalation. This vulnerability could allow an attacker to delete data including data that results in the service being unavailable.

What to do

Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

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Details

Vendor
Microsoft
Product
Windows
CVE
CVE-2025-21391
Affected versions
Windows 10 Version 1507 10.0: from 10.0.10240.0 to 10.0.10240.20915 (excluded) — fixed in 10.0.10240.20915
Windows 10 Version 1607 10.0: from 10.0.14393.0 to 10.0.14393.7785 (excluded) — fixed in 10.0.14393.7785
Windows 10 Version 1809 10.0: from 10.0.17763.0 to 10.0.17763.6893 (excluded) — fixed in 10.0.17763.6893
Windows 10 Version 21H2 10.0: from 10.0.19044.0 to 10.0.19044.5487 (excluded) — fixed in 10.0.19044.5487
Windows 10 Version 22H2 10.0: from 10.0.19045.0 to 10.0.19045.5487 (excluded) — fixed in 10.0.19045.5487
Windows 11 version 22H2 10.0: from 10.0.22621.0 to 10.0.22621.4890 (excluded) — fixed in 10.0.22621.4890
Windows 11 version 22H3 10.0: from 10.0.22631.0 to 10.0.22631.4890 (excluded) — fixed in 10.0.22631.4890
Windows 11 Version 23H2 10.0: from 10.0.22631.0 to 10.0.22631.4890 (excluded) — fixed in 10.0.22631.4890
Windows 11 Version 24H2 10.0: from 10.0.26100.0 to 10.0.26100.3194 (excluded) — fixed in 10.0.26100.3194
Windows Server 2016 10.0: from 10.0.14393.0 to 10.0.14393.7785 (excluded) — fixed in 10.0.14393.7785
Windows Server 2016 (Server Core installation) 10.0: from 10.0.14393.0 to 10.0.14393.7785 (excluded) — fixed in 10.0.14393.7785
Windows Server 2019 10.0: from 10.0.17763.0 to 10.0.17763.6893 (excluded) — fixed in 10.0.17763.6893
Windows Server 2019 (Server Core installation) 10.0: from 10.0.17763.0 to 10.0.17763.6893 (excluded) — fixed in 10.0.17763.6893
Windows Server 2022 10.0: from 10.0.20348.0 to 10.0.20348.3207 (excluded) — fixed in 10.0.20348.3207
Windows Server 2022, 23H2 Edition (Server Core installation) 10.0: from 10.0.25398.0 to 10.0.25398.1425 (excluded) — fixed in 10.0.25398.1425
Windows Server 2025 10.0: from 10.0.26100.0 to 10.0.26100.3194 (excluded) — fixed in 10.0.26100.3194
Windows Server 2025 (Server Core installation) 10.0: from 10.0.26100.0 to 10.0.26100.3194 (excluded) — fixed in 10.0.26100.3194 (from the advisory and NVD; check the exact builds in the official advisory)
CVSS score
7.1
Actively exploited
Yes, listed in the CISA Known Exploited Vulnerabilities catalog
CISA due date
March 4, 2025 (deadline for US federal agencies: a good benchmark for you too)
Source
CISA KEV – original advisory
Published
February 11, 2025

The description and the recommended action are quoted from the public advisory; severity, exploitation status and affected versions are compiled automatically from public sources and may contain errors. The vendor's original advisory prevails: check it before taking action. This information is provided without warranty and does not replace a professional assessment.

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