CVE-2025-21391

Microsoft Windows Storage Link Following Vulnerability

Microsoft — Windows

Added to KEV catalog: 11 February 2025
Federal remediation due date: 4 March 2025
Weakness classification (CWE): CWE-59

CISA 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

View on NVD View on MITRE CVE View full CISA catalog

More Microsoft Vulnerabilities

CVE-2026-65660

Microsoft SharePoint Code Injection Vulnerability

CVE-2026-81963

Microsoft Windows Link Following Vulnerability

CVE-2026-85880

Microsoft Windows Heap-Based Buffer Overflow Vulnerability

CVE-2019-1068

Microsoft SQL Server Remote Code Execution Vulnerability

CVE-2026-33824

Microsoft Internet Key Exchange (IKE) Service Extensions Double Free Vulnerability

Confirm Your Exposure

Is this vulnerability present in your environment?

CRS delivers independent VAPT assessments that identify exactly which known-exploited vulnerabilities exist in your network, applications, and infrastructure.

Explore VAPT Services