Local privilege elevation via heap buffer overflow
Published Aug 12, 2025 · Updated Feb 26, 2026
Heap-based buffer overflow in Microsoft Windows Hyper-V allows local users with low privileges to elevate privileges on affected systems. Microsoft has not disclosed the affected Hyper-V code path or the operation that overruns the heap buffer. Exploitation requires local low-privilege access and can grant higher system privileges, with confidentiality, integrity, and availability impact.
Summary
What happened
Heap-based buffer overflow in Microsoft Windows Hyper-V allows local users with low privileges to elevate privileges on affected systems. Microsoft has not disclosed the affected Hyper-V code path or the operation that overruns the heap buffer. Exploitation requires local low-privilege access and can grant higher system privileges, with confidentiality, integrity, and availability impact.
The record
- CVE
- CVE-2025-53155
- Published
- Aug 12, 2025
- Updated
- Feb 26, 2026
- Vendor
- Microsoft
- Product
- Windows 10 Version 1507
- Classifications
- CWE-122, T1068
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Aug 12, 2025CVE publishedPublication date reported by the CVE source.
- Feb 26, 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 <10.0.10240.21100
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.
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Technologies
Your stack
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Your stack
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