Authenticated memory disclosure via SMB buffer over-read
Published May 13, 2025 · Updated Feb 13, 2026
A buffer over-read in Microsoft Windows SMB allows remote authenticated users to disclose memory contents through network requests. Microsoft identifies Windows SMB as the affected component but has not published the specific parser, message type, or length-validation error. Reachability requires low privileges, high-complexity conditions, user interaction, and network access; impact is bounded to memory disclosure and limited service degradation.
Summary
What happened
A buffer over-read in Microsoft Windows SMB allows remote authenticated users to disclose memory contents through network requests. Microsoft identifies Windows SMB as the affected component but has not published the specific parser, message type, or length-validation error. Reachability requires low privileges, high-complexity conditions, user interaction, and network access; impact is bounded to memory disclosure and limited service degradation.
The record
- CVE
- CVE-2025-29956
- Published
- May 13, 2025
- Updated
- Feb 13, 2026
- Vendor
- Microsoft
- Product
- Windows 10 Version 1507
- Classifications
- CWE-126, CWE-125
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- May 13, 2025CVE publishedPublication date reported by the CVE source.
- Feb 13, 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 <10.0.10240.21014
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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