CVE Tools
Track your stack

CVE-2025-62221

Windows Cloud Files Mini Filter Driver Elevation of Privilege Vulnerability

Exploited in the wild. In CISA KEV since 2025‑12‑09. Fixed versions are out.

CVSS 3.17.8HighEPSS percentile85th2.5% chance in 30 daysCISA KEVListedsince 2025-12-09, due 2025-12-30
No public exploit knownFix5 products8 fixed builds listed below

Published Updated Sources: CVE.org, NVD, BDU

NVD CVE.org

What to do

Find your product and version, then upgrade to the build on the right.

  • Microsoft Windows 10 Version 1809Affected: ≥ 10.0.17763.0, < 10.0.17763.8146Upgrade to: 10.0.17763.8146Affected: ≥ 10.0.19044.0, < 10.0.19044.6691Upgrade to: 10.0.19044.6691Affected: ≥ 10.0.19045.0, < 10.0.19045.6691Upgrade to: 10.0.19045.6691Stated by: CVE record
  • Microsoft Windows 11 version 22H3Affected: ≥ 10.0.22631.0, < 10.0.22631.6345Upgrade to: 10.0.22631.6345Affected: ≥ 10.0.26100.0, < 10.0.26100.7462Upgrade to: 10.0.26100.7462Affected: ≥ 10.0.26200.0, < 10.0.26200.7462Upgrade to: 10.0.26200.7462Stated by: CVE record
  • Microsoft Windows Server 2019Affected: ≥ 10.0.17763.0, < 10.0.17763.8146Upgrade to: 10.0.17763.8146Stated by: CVE record
  • Microsoft Windows Server 2022Affected: ≥ 10.0.20348.0, < 10.0.20348.4529Upgrade to: 10.0.20348.4529Affected: ≥ 10.0.25398.0, < 10.0.25398.2025Upgrade to: 10.0.25398.2025Stated by: CVE record
  • Microsoft Windows Server 2025Affected: ≥ 10.0.26100.0, < 10.0.26100.7462Upgrade to: 10.0.26100.7462Stated by: CVE record

Versions as the sources state them. Full version matrix after sign-in

Check it yourselfA free OpenVAS check exists for this CVE. Run it against your hosts.Is your organisation exposed?Request an assessment to establish which checks fit your systems.

Coverage timeline

0 publishers

  1. Added to CISA KEV catalog

    ·CISA KEV

Sourced from public security reporting — each date is when it was published, not when it happened. 2 further articles named this CVE in wider roundups without reporting it as a distinct event.

What it is

From the CVE record

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

In plain language

No plain-language summary for this CVE yet.

Exploitation

Where each signal puts this CVE on the scale from published to confirmed exploited.

EPSS85th
CISA KEV
CISA KEV

Listed as exploited in the wild since 2025-12-09.

US federal agencies must remediate by 2025-12-30.

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 exploits

No public exploit or proof of concept found in the sources we track.

EPSS

2.5% chance of exploitation activity in the next 30 days, which ranks it in the 85th percentile of scored CVEs.

Exploit Prediction Scoring System, FIRST.org. A probability, not a confirmation.

Lifecycle

9 events over 290 days, from the signal feeds we watch.

  1. Patch availablerecord updated
  2. OpenVAS check added
  3. Patch availablerecord updated
  4. Added to CISA KEVpublished, weakness classified, att&ck mapped

Affected products

And 31 more affected products. See all after sign-in

Technical detail

CVSS 3.1 vector

Open in the CVSS calculator

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Scored 7.8 by NVD.

How it is reached

  • Attack Vector LocalRequires local access to the vulnerable system (e.g. local login, malicious file)
  • Attack Complexity LowNo special conditions — the attack can be reliably reproduced
  • Privileges Required LowRequires basic user-level privileges
  • User Interaction NoneNo user interaction needed — fully automated exploitation

Scope

  • Scope UnchangedImpact is limited to the vulnerable component itself

Impact if exploited

  • Confidentiality HighTotal information disclosure — all data in the component is compromised
  • Integrity HighTotal loss of integrity — attacker can modify any data in the component
  • Availability HighTotal denial of service — the component is completely unavailable

Weaknesses

ATT&CK techniques

Mapped from the weaknesses above (CWE to ATT&CK), not observed in attacks.

Sources

References in the record

In the news

Watch the software you run.

My Stack ranks new CVEs for your products by real-world exploitation, so the next exploited one reaches you without reading every advisory.

We'll flag the next CVE, public exploit or patch for Windows 10 Version 1809, not every advisory. This one: actively exploited.