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Fencer Intel
high 7.8

CVE-2025-62221 kev in the critical feed json

Windows Cloud Files Mini Filter Driver Elevation of Privilege Vulnerability

published 11mo ago modified last mo. also EUVD-2025-202200

cvss
7.8
version 3.1, CNA
cisa kev
Exploited
added 2025-12-09
epss
2.5%
EPSS 2.5% chance of exploitation in 30 days, percentile 84%
public exploits
0
none known

Summary

Use after free in Windows Cloud Files Mini Filter Driver allows an authorized attacker to elevate privileges locally.

Patch / fix

cisa required action Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

  • Microsoft Windows 10 Version 1809 10.0.17763.8146
  • Microsoft Windows 10 Version 21H2 10.0.19044.6691
  • Microsoft Windows 10 Version 22H2 10.0.19045.6691
  • Microsoft Windows 11 version 22H3 10.0.22631.6345
  • Microsoft Windows 11 Version 23H2 10.0.22631.6345
  • Microsoft Windows 11 Version 24H2 10.0.26100.7462
  • Microsoft Windows 11 Version 25H2 10.0.26200.7462
  • Microsoft Windows Server 2019 10.0.17763.8146
  • Microsoft Windows Server 2019 (Server Core installation) 10.0.17763.8146
  • Microsoft Windows Server 2022 10.0.20348.4529
  • Microsoft Windows Server 2022, 23H2 Edition (Server Core installation) 10.0.25398.2025
  • Microsoft Windows Server 2025 10.0.26100.7462
  • Microsoft Windows Server 2025 (Server Core installation) 10.0.26100.7462

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Timeline

  1. 0-day patched (Project Zero)
  2. Added to CISA KEV
  3. Published
  4. CISA SSVC: exploitation active
  5. CISA patch deadline

Known exploited

Added
11mo ago
Patch by
2025-12-30 (10mo ago)
Ransomware
Not known
Required action
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Vendor, product
Microsoft, Windows
CISA name
Microsoft Windows Use After Free Vulnerability

Zero-day

Detected in real attacks while still unknown to the vendor and the public, per Google Project Zero's 0day In-the-Wild tracker.

Patched
2025-12-09
Details
project zero tracker

CISA SSVC

Exploitation
Active, exploited in the wild
Automatable
no
Technical impact
total
Assessed
10mo ago

Exploit prediction

2.51% chance of exploitation in the next 30 days, higher than 84% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
CNA 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

  • Microsoft Windows 10 Version 1809
  • Microsoft Windows 10 Version 21H2
  • Microsoft Windows 10 Version 22H2
  • Microsoft Windows 11 version 22H3
  • Microsoft Windows 11 Version 23H2
  • Microsoft Windows 11 Version 24H2
  • Microsoft Windows 11 Version 25H2
  • Microsoft Windows Server 2019
  • Microsoft Windows Server 2019 (Server Core installation)
  • Microsoft Windows Server 2022
  • Microsoft Windows Server 2022, 23H2 Edition (Server Core installation)
  • Microsoft Windows Server 2025
  • Microsoft Windows Server 2025 (Server Core installation)

Classification

Weakness

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.