Microsoft Windows Storage Link Following Vulnerability (CVE-2025-21391)
Severity: high · Patch status: patched · Since 2025-02-11 · CVE-2025-21391
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. CISA added CVE-2025-21391 to its Known Exploited Vulnerabilities catalog on Feb 11, 2025, which means attackers are exploiting it in the wild.
What to do
- Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
- US federal agencies must remediate by Mar 4, 2025 (BOD 22-01); treat that as the outer limit.
Sources
All live incidents on Threat Watch