CVE-2025-6147
Published: 17 June 2025
Summary
CVE-2025-6147 is a high-severity Improper Restriction of Operations within the Bounds of a Memory Buffer (CWE-119) vulnerability in Totolink A702R Firmware. Its CVSS base score is 7.4 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked in the top 19.4% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
Deeper analysis
A vulnerability has been identified in the TOTOLINK A702R router running firmware version 4.0.0-B20230721.1521. The issue resides in an unknown portion of the code within the file /boafrm/formSysLog that belongs to the HTTP POST Request Handler component. Manipulation of the submit-url argument triggers a buffer overflow, which has been assigned CWE-119 and CWE-120 and carries a CVSS 4.0 score of 7.4.
The flaw can be exploited remotely by an authenticated attacker who sends a crafted HTTP POST request to the affected endpoint. Successful exploitation grants the attacker the ability to execute arbitrary code or crash the device, resulting in high impacts to confidentiality, integrity, and availability. A proof-of-concept has already been published, indicating that the attack is practical for anyone with network access and valid credentials.
The associated EPSS score remains low at approximately 0.0136 with a peak of 0.0137, showing no significant increase after disclosure. Public references consist of a GitHub repository containing the exploit details and corresponding VulDB entries, but no vendor advisory or patch information is referenced in the available sources.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2025-18457
Vulnerability details
A vulnerability was found in TOTOLINK A702R 4.0.0-B20230721.1521. It has been declared as critical. This vulnerability affects unknown code of the file /boafrm/formSysLog of the component HTTP POST Request Handler. The manipulation of the argument submit-url leads to buffer overflow.…
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The attack can be initiated remotely. The exploit has been disclosed to the public and may be used.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Buffer overflow in the router's public-facing web interface (/boafrm/formSysLog) via remote HTTP POST manipulation of 'submit-url' enables remote code execution, directly facilitating T1190: Exploit Public-Facing Application.
Affected Assets
Mitigating Controls
Likely Mitigating Controls AI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
Managed runtimes used by platform-independent applications (e.g., JVM, CLR) enforce memory safety, preventing most buffer overflows that require direct memory manipulation.
Ongoing control assessments and code testing (static/dynamic analysis, fuzzing) surface memory buffer restriction failures, which are then remediated before release.
Memory protections (e.g., W^X, ASLR) make exploitation of buffer-boundary violations far harder to turn into code execution.
Detects exploitation attempts that produce memory corruption, crashes, or anomalous behavior.