CVE-2025-21391
Actively exploited. CVE-2025-21391 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2025-02-11) — exploitation has been observed in the wild, and US federal agencies are required to remediate it under BOD 22-01. Treat patching as urgent.
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.
CSIRTS triage
- What
- Windows Storage contains a link following vulnerability that could allow for privilege escalation.
- Who is affected
- Users of Microsoft Windows with the affected Storage component.
- Urgency
- Remediation is critical as the vulnerability is actively exploited and can lead to severe consequences.
- Action
- Apply the latest updates for Microsoft Windows to mitigate this vulnerability.
AI-assisted analysis generated from the source advisory — verify against the original.
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Exploitation outlook
- Exploitation confirmedAlready exploited in the wild (CISA KEV) — the prediction phase is over. Patch now. Riskier than 81% of all EPSS-scored CVEs.
Advisory coverage (1)
- criticalexploitedCVE-2025-21391: Microsoft Windows Storage Link Following Vulnerabilitycisa-kev · 2025-02-11
External references
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