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CVE

CVE-2025-62221

Microsoft Windows Use After Free Vulnerability

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

HIGH · CVSS 7.8 ⚠ CISA KEV EPSS 0.02094
Act now
  • Listed on CISA KEV (known exploited in the wild)
  • SSVC exploitation status: active
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬢

Required Remediation

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

⬡

Weakness Classification

CWE-416Use After Free
▤

Affected Products & Versions

10
microsoft windows 10 1809< 10.0.17763.8146
microsoft windows 10 21h2< 10.0.19044.6691
microsoft windows 10 22h2< 10.0.19045.6691
microsoft windows 11 23h2< 10.0.22631.6345
microsoft windows 11 24h2< 10.0.26100.7392
microsoft windows 11 25h2< 10.0.26200.7392
microsoft windows server 2019< 10.0.17763.8146
microsoft windows server 2022< 10.0.20348.4467
▣

Scoring & Timeline

7.8
HIGH · CVSS v3.1 · secure@microsoft.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD09 Dec 2025 · 06:15 PM
CVSS VectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC triage · cisa-vulnrichment
Exploitation
active
Automatable
no
Technical impact
total
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
⚑

Vendor Advisories

2
msrcCVE-2025-62221Elevation of Privilege
cisaKEV-CVE-2025-62221
🔗

References & Sources

1
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-62221US Government Resource
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