Local privilege escalation via use-after-free
Published Mar 10, 2026 · Updated Mar 10, 2026
Use-after-free in Microsoft Brokering File System allows local users to elevate privileges on affected Windows systems. Microsoft has not disclosed the affected code path, object lifetime error, or input that reaches the freed memory. Exploitation requires local access and high-complexity conditions but no prior privileges or user interaction, and success grants elevated privileges.
Summary
What happened
Use-after-free in Microsoft Brokering File System allows local users to elevate privileges on affected Windows systems. Microsoft has not disclosed the affected code path, object lifetime error, or input that reaches the freed memory. Exploitation requires local access and high-complexity conditions but no prior privileges or user interaction, and success grants elevated privileges.
The record
- CVE
- CVE-2026-25167
- Published
- Mar 10, 2026
- Updated
- Mar 10, 2026
- Vendor
- Microsoft
- Product
- Windows Server 2025 (Server Core installation)
- Classifications
- CWE-416, T1068
- Attack vector
- local
- Privileges
- unauthenticated
Timeline
How it unfolded
- Mar 10, 2026CVE publishedPublication date reported by the CVE source.
- Mar 10, 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=10.0.26100.0 <10.0.26100.32522
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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