Feb 2025: Windows Storage Elevation of Privilege Vulnerability
CVE-2025-21391 Published on February 11, 2025

Windows Storage Elevation of Privilege Vulnerability
Windows Storage Elevation of Privilege Vulnerability

Vendor Advisory NVD

Known Exploited Vulnerability

This Microsoft Windows Storage Link Following Vulnerability is part of CISA's list of Known Exploited Vulnerabilities. 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.

The following remediation steps are recommended / required by March 4, 2025: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Weakness Type

What is an insecure temporary file Vulnerability?

The software attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource.

CVE-2025-21391 has been classified to as an insecure temporary file vulnerability or weakness.

Products Associated with CVE-2025-21391

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Microsoft Windows Server 2019

Microsoft Windows Server 2022

Microsoft Windows 11

Microsoft Windows 10

Microsoft Windows 11 23h2

Microsoft Windows Server 2022 23h2

Microsoft Windows 11 24h2

Microsoft Windows Server 2025

Microsoft Windows 10 1507

Microsoft Windows Server 2016

Microsoft Windows Server 23h2

Affected Versions

Microsoft Windows 10 Version 1507:

Version 10.0.10240.0 and below 10.0.10240.20915 is affected.

Microsoft Windows 10 Version 1607:

Version 10.0.14393.0 and below 10.0.14393.7785 is affected.

Microsoft Windows 10 Version 1809:

Version 10.0.17763.0 and below 10.0.17763.6893 is affected.

Microsoft Windows 10 Version 21H2:

Version 10.0.19044.0 and below 10.0.19044.5487 is affected.

Microsoft Windows 10 Version 22H2:

Version 10.0.19045.0 and below 10.0.19045.5487 is affected.

Microsoft Windows 11 version 22H2:

Version 10.0.22621.0 and below 10.0.22621.4890 is affected.

Microsoft Windows 11 version 22H3:

Version 10.0.22631.0 and below 10.0.22631.4890 is affected.

Microsoft Windows 11 Version 23H2:

Version 10.0.22631.0 and below 10.0.22631.4890 is affected.

Microsoft Windows 11 Version 24H2:

Version 10.0.26100.0 and below 10.0.26100.3194 is affected.

Microsoft Windows Server 2016:

Version 10.0.14393.0 and below 10.0.14393.7785 is affected.

Microsoft Windows Server 2016 (Server Core installation):

Version 10.0.14393.0 and below 10.0.14393.7785 is affected.

Microsoft Windows Server 2019:

Version 10.0.17763.0 and below 10.0.17763.6893 is affected.

Microsoft Windows Server 2019 (Server Core installation):

Version 10.0.17763.0 and below 10.0.17763.6893 is affected.

Microsoft Windows Server 2022:

Version 10.0.20348.0 and below 10.0.20348.3207 is affected.

Microsoft Windows Server 2022, 23H2 Edition (Server Core installation):

Version 10.0.25398.0 and below 10.0.25398.1425 is affected.

Microsoft Windows Server 2025:

Version 10.0.26100.0 and below 10.0.26100.3194 is affected.

Microsoft Windows Server 2025 (Server Core installation):

Version 10.0.26100.0 and below 10.0.26100.3194 is affected.

Exploit Probability

EPSS

4.72%

Percentile

89.42%

EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.