Local privilege escalation via buffer over-read
Published Dec 9, 2025 · Updated Apr 16, 2026
Buffer over-read in the Projected File System Filter Driver in Microsoft Windows allows local users to elevate privileges. Microsoft identifies the kernel-mode filter driver as the locus but has not published the routine, input, or bounds error that causes the over-read. Low-privileged local access is required, and successful exploitation elevates privileges without user interaction; the resulting level is undisclosed.
Summary
What happened
Buffer over-read in the Projected File System Filter Driver in Microsoft Windows allows local users to elevate privileges. Microsoft identifies the kernel-mode filter driver as the locus but has not published the routine, input, or bounds error that causes the over-read. Low-privileged local access is required, and successful exploitation elevates privileges without user interaction; the resulting level is undisclosed.
The record
- CVE
- CVE-2025-62461
- Published
- Dec 9, 2025
- Updated
- Apr 16, 2026
- Vendor
- Microsoft
- Product
- Windows Server 2019
- Classifications
- CWE-126, T1068
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Dec 9, 2025CVE publishedPublication date reported by the CVE source.
- Apr 16, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=10.0.17763.0 <10.0.17763.8146
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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