Remote code execution via stack buffer overflow
Published May 13, 2025 · Updated Feb 26, 2026
Stack-based buffer overflow in Windows Media on affected Windows releases allows remote attackers to execute code via network content. Microsoft has not disclosed the specific parser, data field, or unchecked copy operation that overruns the stack buffer. Exploitation requires user interaction with attacker-supplied content, and successful code execution occurs in the affected process context.
Summary
What happened
Stack-based buffer overflow in Windows Media on affected Windows releases allows remote attackers to execute code via network content. Microsoft has not disclosed the specific parser, data field, or unchecked copy operation that overruns the stack buffer. Exploitation requires user interaction with attacker-supplied content, and successful code execution occurs in the affected process context.
The record
- CVE
- CVE-2025-29840
- Published
- May 13, 2025
- Updated
- Feb 26, 2026
- Vendor
- Microsoft
- Product
- Windows 10 Version 1507
- Classifications
- CWE-787, CWE-121, T1204.002
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- May 13, 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 <10.0.10240.21014
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.
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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