Authenticated router crash via unchecked submit-url copy
Published Jul 1, 2025 · Updated Jul 1, 2025
Buffer overflow in the A3002RU 3.0.0-B20230809.1615 HTTP POST handler allows remote authenticated users to crash the router. The /boafrm/formWlSiteSurvey route passes an oversized submit-url value into a buffer without performing bounds checking. Exploitation requires a valid management session, and the published request demonstrates denial of service rather than code execution.
Summary
What happened
Buffer overflow in the A3002RU 3.0.0-B20230809.1615 HTTP POST handler allows remote authenticated users to crash the router. The /boafrm/formWlSiteSurvey route passes an oversized submit-url value into a buffer without performing bounds checking. Exploitation requires a valid management session, and the published request demonstrates denial of service rather than code execution.
The record
- CVE
- CVE-2025-6939
- Published
- Jul 1, 2025
- Updated
- Jul 1, 2025
- Vendor
- TOTOLINK
- Product
- A3002RU
- Classifications
- CWE-119, CWE-120, T1499.004
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Jul 1, 2025CVE publishedPublication date reported by the CVE source.
- Jul 1, 2025Record 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=3.0.0-B20230809.1615
What conditions does exploitation require?
What is affected?
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
- A3002RU formWlSiteSurvey malicious POST proof of conceptproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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