CVE Watch—

CVE-2025-21391

Microsoft Windows Storage Link Following Vulnerability

CVSS

—

No CVSS

EPSS

2.3%

p81

KEV

YES

Feb 11, 2025

Exploit Today

0-100

Published: — · Last modified: —

EPSS · 30d

2.1%EPSS · 30 days2.3%

2026-06-302026-07-17

KEV catalog record

Product

Microsoft / Windows

Vulnerability

Microsoft Windows Storage Link Following Vulnerability

Added to KEV

Feb 11, 2025

Remediate by

Mar 4, 2025

Known ransomware use

Summary 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.

Required action

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

Notes

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21391 ; https://nvd.nist.gov/vuln/detail/CVE-2025-21391

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