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

CVE-2025-21391 · Severity: critical · CVSS 7.1 · Exploited in the wild · Published 2025-02-11

Microsoft Windows Storage contains a link following vulnerability (CWE-59) that allows for elevation of privilege. An attacker exploiting this flaw could delete sensitive data, potentially leading to service unavailability or unauthorized system access.

Technologies: Microsoft Windows. Vendors: Microsoft.

Quick answers

Is CVE-2025-21391 exploited in the wild?
Yes. CVE-2025-21391 is known to be exploited in the wild, first recorded on 11 February 2025. Treat it as urgent.
How severe is CVE-2025-21391?
Critical severity, with a CVSS score of 7.1, published 11 February 2025.
Which products and versions are affected?
Microsoft Windows 10 1507, 1607, 1809, 21H2, 22H2; Microsoft Windows 11 22H2, 23H2, 24H2; Microsoft Windows Server 2016, 2019, 2022, 2025, 23H2.
Is there a fix for CVE-2025-21391?
A patch was published on 2025-02-11. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2025-21391 attacked?
It is attacked with local access, in an operating system.
Am I affected by CVE-2025-21391?
Check whether you run Microsoft Windows. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Affected products

  • Microsoft Windows 10 1507, 1607, 1809, 21H2, 22H2
  • Microsoft Windows 11 22H2, 23H2, 24H2
  • Microsoft Windows Server 2016, 2019, 2022, 2025, 23H2

Timeline

  • 2025-02-11: disclosed
  • 2025-02-11: patched
  • 2025-02-11: kev added: Added to CISA Known Exploited Vulnerabilities Catalog
  • 2025-02-11: exploited: Reported as exploited in the wild at time of publication.

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