Use After Free in Microsoft Windows 10 1809

CVE-2025-62221

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

Vulnerability class: Use-After-Free

Published · last modified .

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.025 (84.5th percentile), scored .

Low probability of exploitation in the next 30 days, but still tracked. 84th percentile — 84.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2025-62221: held from 0.025 to 0.025.

EPSS over last 30 days · oldest: 0.025 · newest: 0.025 · change: 0.000

Affected products

Weakness classification (CWE)

CISA KEV (Known Exploited Vulnerabilities)

This CVE is on the CISA KEV catalog, added on . CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.

BOD 22-01 due date: .

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.

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2025-62221?
CVE-2025-62221 is a high-severity vulnerability in Microsoft Windows 10 1809, classified under Use After Free. CVSS score: 7.8/10. Published 2025-12-09.
How severe is CVE-2025-62221?
High severity. CVSS v3 base score is 7.8 out of 10.
Is CVE-2025-62221 known to be exploited?
Yes. CVE-2025-62221 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2025-12-09), indicating it is being actively exploited. 1 public proof-of-concept repositories are indexed.