Remote code execution via RRAS heap overflow
Published Feb 11, 2025 · Updated Feb 26, 2026
A heap-based buffer overflow in Microsoft Windows Server RRAS allows remote attackers to execute code after the target connects to a malicious server. Microsoft identifies the faulty component and weakness class but does not disclose the parsing routine, input field, or unchecked write that overruns heap memory. Exploitation requires user interaction for the connection; successful code execution can compromise the affected server.
Summary
What happened
A heap-based buffer overflow in Microsoft Windows Server RRAS allows remote attackers to execute code after the target connects to a malicious server. Microsoft identifies the faulty component and weakness class but does not disclose the parsing routine, input field, or unchecked write that overruns heap memory. Exploitation requires user interaction for the connection; successful code execution can compromise the affected server.
The record
- CVE
- CVE-2025-21410
- Published
- Feb 11, 2025
- Updated
- Feb 26, 2026
- Vendor
- Microsoft
- Product
- Windows Server 2019
- Classifications
- CWE-122, CAPEC-92, T1203
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Feb 11, 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 <10.0.17763.6893
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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