Risk Letters

Exploited vulnerability

CVE-2025-62221

TLP:CLEAR

Microsoft Windows Use After Free Vulnerability

Microsoft Windows Cloud Files Mini Filter Driver contains a use after free vulnerability that can allow an authorized attacker to elevate privileges locally.

Facts

  • Vendor: Microsoft
  • Product: Windows
  • CVSS: 7.8
  • EPSS (probability of exploitation within 30 days): 2.5 %
  • On CISA's Known Exploited Vulnerabilities list since: 9 December 2025
  • First known exploitation: 9 December 2025
  • CISA's deadline for US federal agencies: 30 December 2025
  • Weakness: CWE-416
  • First seen by Risk Letters: 9 December 2025

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

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