CVE-2025-6146
Published: 17 June 2025
Summary
CVE-2025-6146 is a high-severity Improper Restriction of Operations within the Bounds of a Memory Buffer (CWE-119) vulnerability in Totolink X15 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 classified as critical has been identified in the TOTOLINK X15 router firmware version 1.0.0-B20230714.1105. It resides in an unspecified portion of the file /boafrm/formSysLog within the HTTP POST Request Handler component. The flaw stems from improper handling of the submit-url argument, resulting in a buffer overflow condition tracked under CWE-119 and CWE-120. The issue can be triggered remotely without authentication in the base CVSS 4.0 scoring.
An authenticated attacker can send a crafted HTTP POST request to the affected endpoint, supplying oversized input to the submit-url parameter. Successful exploitation grants the ability to overwrite memory regions, potentially leading to arbitrary code execution, denial of service, or full device compromise. Public proof-of-concept code has already been released, confirming remote reachability and lowering the barrier for attempted misuse.
The associated EPSS score remains low and essentially flat, with a current value of 0.0136 against a recorded peak of 0.0137. No official vendor advisory or patch information appears among the referenced sources, which consist primarily of third-party vulnerability databases and a public exploit repository.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2025-18427
Vulnerability details
A vulnerability was found in TOTOLINK X15 1.0.0-B20230714.1105. It has been classified as critical. This affects an unknown part 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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It is possible to initiate the attack 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 vulnerability in the public-facing web interface (/boafrm/formSysLog) of TOTOLINK X15 router via remote HTTP POST enables exploitation for initial access.
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.