CVE-2025-21391: Microsoft Windows Storage Link Following Vulnerability

Published Feb 11, 2025
·
Updated

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.

Other sources

Windows Storage Elevation of Privilege Vulnerability

— Microsoft

Affected Software

44 affected componentsFixes available
Microsoft Windows
Microsoft Windows 10 1507<10.0.10240.20915
Microsoft Windows 10 1507<10.0.10240.20915
Microsoft Windows 10 1607<10.0.14393.7785
Microsoft Windows 10 1607<10.0.14393.7785
Microsoft Windows 10 1809<10.0.17763.6893
Microsoft Windows 10 1809<10.0.17763.6893
Microsoft Windows 10 21h2<10.0.19044.5487
Microsoft Windows 10 22h2<10.0.19045.5487
Microsoft Windows 11 22h2<10.0.22621.4890
Microsoft Windows 11 23h2<10.0.22631.4890
Microsoft Windows 11 24h2<10.0.26100.3107
Microsoft Windows Server 2016<10.0.14393.7785
Microsoft Windows Server 2019<10.0.17763.6893
Microsoft Windows Server 2022<10.0.20348.3148
Microsoft Windows Server 2022 23h2<10.0.25398.1425
Microsoft Windows Server 2025<10.0.26100.3107
Microsoft Windows 10=1607
10.0.14393.7785
Microsoft Windows Server 2016<10.0.14393.7785
10.0.14393.7785
Microsoft Windows 10<10.0.10240.20915
10.0.10240.20915
Microsoft Windows 10=1607
10.0.14393.7785
Microsoft Windows 10<10.0.10240.20915
10.0.10240.20915
Microsoft Windows 11=24H2
10.0.26100.319410.0.26100.3107
Microsoft Windows Server 2025<10.0.26100.3194, <10.0.26100.3107
10.0.26100.319410.0.26100.3107
Microsoft Windows 11=24H2
10.0.26100.319410.0.26100.3107
Microsoft Windows Server 2016<10.0.14393.7785
10.0.14393.7785
Microsoft Windows 11=23H2
10.0.22631.4890
Microsoft Windows 11=23H2
10.0.22631.4890
Microsoft Windows Server 2025<10.0.26100.3194, <10.0.26100.3107
10.0.26100.319410.0.26100.3107
Microsoft Windows 10=22H2
10.0.19045.5487
Microsoft Windows 10=22H2
10.0.19045.5487
Microsoft Windows 10=22H2
10.0.19045.5487
Microsoft Windows 11=22H2
10.0.22621.4890
Microsoft Windows Server 2022, 23H2 Edition<10.0.25398.1425
10.0.25398.1425
Microsoft Windows 11=22H2
10.0.22621.4890
Microsoft Windows 10=21H2
10.0.19044.5487
Microsoft Windows Server 2022<10.0.20348.3207, <10.0.20348.3148
10.0.20348.320710.0.20348.3148
Microsoft Windows 10=21H2
10.0.19044.5487
Microsoft Windows 10=21H2
10.0.19044.5487
Microsoft Windows Server 2022<10.0.20348.3207, <10.0.20348.3148
10.0.20348.320710.0.20348.3148
Microsoft Windows Server 2019<10.0.17763.6893
10.0.17763.6893
Microsoft Windows 10=1809
10.0.17763.6893
Microsoft Windows Server 2019<10.0.17763.6893
10.0.17763.6893
Microsoft Windows 10=1809
10.0.17763.6893

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 10.0.14393.7785Patch KB5052006
  2. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 10.0.10240.20915Patch KB5052040
  3. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 10.0.26100.3194Fixed in 10.0.26100.3107Patch KB5052105
  4. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 10.0.22631.4890Patch KB5051989
  5. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 10.0.19045.5487Patch KB5051974
  6. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 10.0.22621.4890Patch KB5051989
  7. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 10.0.25398.1425Patch KB5051980
  8. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 10.0.19044.5487Patch KB5051974
  9. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 10.0.20348.3207Fixed in 10.0.20348.3148Patch KB5052106
  10. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 10.0.17763.6893Patch KB5052000

Event History

Feb 11, 2025
CVE Published
via CISA·12:00 AM
Known Exploited
via CISA·12:00 AM
Data Sourced
via Microsoft·08:00 AM
DescriptionSeverityWeakness
Data Sourced
via Microsoft·08:00 AM
Affected Software
Updated
via Microsoft·08:00 AM
Affected Software
Updated
via Microsoft·08:00 AM
Description
CVE Published
via MITRE·05:58 PM
Data Sourced
via MITRE·05:58 PM
DescriptionSeverity
Data Sourced
via NVD·06:15 PM
RemedyDescriptionSeverityWeaknessAffected Software
News Published
via Dark Reading·09:55 PM
News Published
via Dark Reading·10:24 PM
Feb 12, 2025
News Published
via The Register·02:58 AM
News Published
via ZDNet·05:29 PM
News Published
via ZDNet·06:28 PM
Feb 16, 2025
News Published
via The Register·03:01 AM

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Frequently Asked Questions

1

What is the severity of CVE-2025-21391?

CVE-2025-21391 is classified as a privilege escalation vulnerability.

2

How do I fix CVE-2025-21391?

To fix CVE-2025-21391, apply the relevant security patches provided by Microsoft for the affected products.

3

What products are affected by CVE-2025-21391?

CVE-2025-21391 affects various Microsoft products including Windows Server 2016, Windows 10 (multiple versions), and Windows 11.

4

Can CVE-2025-21391 lead to data loss?

Yes, CVE-2025-21391 could allow an attacker to delete critical data, resulting in data loss.

5

Is there a known exploit for CVE-2025-21391?

As of now, there is no publicly disclosed exploit specifically targeting CVE-2025-21391.

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