Risk Letters

Exploited vulnerability

CVE-2025-21391

TLP:CLEAR

Microsoft Windows Storage Link Following Vulnerability

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.

Facts

  • Vendor: Microsoft
  • Product: Windows
  • CVSS: 7.1
  • EPSS (probability of exploitation within 30 days): 2.3 %
  • On CISA's Known Exploited Vulnerabilities list since: 11 February 2025
  • First known exploitation: 11 February 2025
  • CISA's deadline for US federal agencies: 4 March 2025
  • Weakness: CWE-59
  • First seen by Risk Letters: 11 February 2025

Members see which Nordic sectors the flaw hits, and what to do about it.

Get the full brief

Data: NVD (public domain), CISA KEV, FIRST EPSS, MITRE ATT&CK, AlienVault OTX. NVD