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CVE-2025-62454

HighPublished

Windows Cloud Files Mini Filter Driver Elevation of Privilege Vulnerability

Published: Dec 9, 2025
Updated: Apr 16, 2026
Assigning CNA: microsoft
Evidence observed: Aug 8, 2026

Primary CVSS

7.8/ 10High

nvd · CVSS 3.1

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

EPSS probability estimate

2.3%

Low · next 30 days

Percentile: 82.5%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

Heap-based buffer overflow in Windows Cloud Files Mini Filter Driver allows an authorized attacker to elevate privileges locally.

Sources

CVE-2025-62454PoC
Proof-of-concept for CVE-2025-62454 that triggers a Windows kernel crash (BSOD) in cldflt.sys via a crafted FSCTL request, causing a page fault in memcpy.

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