CVE-2025-21391 — Microsoft Windows Storage Link Following Vulnerability
CVE-2025-21391: Microsoft Windows Storage Link Following Vulnerability
CISA Known Exploited Vulnerability (KEV)
| Vendor / project | Microsoft |
| Product | Windows |
| Date added | 2025-02-11 |
| Due date | 2025-03-04 |
| Ransomware campaign use | Unknown |
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 (CISA)
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
References
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-21391
- KEV catalog: https://www.cisa.gov/known-exploited-vulnerabilities-catalog