CVE-2025-6129
Published: 16 June 2025
Summary
CVE-2025-6129 is a high-severity Improper Restriction of Operations within the Bounds of a Memory Buffer (CWE-119) vulnerability in Totolink Ex1200T Firmware. Its CVSS base score is 7.4 (High).
Operationally, ranked in the top 19.6% 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 critical buffer overflow vulnerability, tracked as CVE-2025-6129 and also associated with CWE-119 and CWE-120, affects the TOTOLINK EX1200T wireless router running firmware version 4.1.2cu.5232_B20210713. The flaw resides in the HTTP POST Request Handler component, specifically within the /boafrm/formSaveConfig endpoint, where improper handling of the submit-url argument allows an attacker to trigger memory corruption.
An authenticated remote attacker can exploit the issue by sending a crafted HTTP POST request containing an oversized or malformed submit-url value. Successful exploitation grants the attacker the ability to execute arbitrary code or crash the affected device, with the CVSS 4.0 score of 7.4 reflecting high impact on confidentiality, integrity, and availability when network access is available.
Public proof-of-concept code has been disclosed on GitHub, and the EPSS score remains low at approximately 0.0134 with negligible movement from its recorded peak. No vendor advisory or patch information is referenced in the available sources.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2025-18419
Vulnerability details
A vulnerability classified as critical was found in TOTOLINK EX1200T 4.1.2cu.5232_B20210713. This vulnerability affects unknown code of the file /boafrm/formSaveConfig of the component HTTP POST Request Handler. The manipulation of the argument submit-url leads to buffer overflow. The attack can…
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be initiated remotely. The exploit has been disclosed to the public and may be used.
- CWE(s)
Related Threats
No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.
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.