Local privilege escalation via integer overflow
Published Sep 9, 2025 · Updated Feb 20, 2026
Integer overflow in Windows Hyper-V on affected Microsoft Windows releases allows local users to elevate privileges on the host. Microsoft identifies an integer overflow and resulting heap-based buffer overflow but has not disclosed the affected function or malformed operation. Exploitation requires existing low-privileged local access and grants control over host confidentiality, integrity, and availability.
Summary
What happened
Integer overflow in Windows Hyper-V on affected Microsoft Windows releases allows local users to elevate privileges on the host. Microsoft identifies an integer overflow and resulting heap-based buffer overflow but has not disclosed the affected function or malformed operation. Exploitation requires existing low-privileged local access and grants control over host confidentiality, integrity, and availability.
The record
- CVE
- CVE-2025-54091
- Published
- Sep 9, 2025
- Updated
- Feb 20, 2026
- Vendor
- Microsoft
- Product
- Windows 10 Version 1507
- Classifications
- CWE-190, CWE-122, T1068
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Sep 9, 2025CVE publishedPublication date reported by the CVE source.
- Feb 20, 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=10.0.10240.0 <10.0.10240.21128
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.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
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Your stack
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