Remote code execution via RRAS heap overflow
Published Jul 8, 2025 · Updated Feb 26, 2026
Heap-based buffer overflow in Microsoft Windows RRAS allows remote attackers to execute code via network traffic requiring user interaction. Microsoft has not disclosed the affected RRAS routine, input field, or the allocation and copy mismatch that causes the heap overwrite. Exploitation requires no privileges but does require user interaction, and successful exploitation grants code execution on the server.
Summary
What happened
Heap-based buffer overflow in Microsoft Windows RRAS allows remote attackers to execute code via network traffic requiring user interaction. Microsoft has not disclosed the affected RRAS routine, input field, or the allocation and copy mismatch that causes the heap overwrite. Exploitation requires no privileges but does require user interaction, and successful exploitation grants code execution on the server.
The record
- CVE
- CVE-2025-49729
- Published
- Jul 8, 2025
- Updated
- Feb 26, 2026
- Vendor
- Microsoft
- Product
- Windows Server 2019
- Classifications
- CWE-122, T1190
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jul 8, 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=10.0.17763.0 <10.0.17763.7558
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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