CVE-2025-6336
Published: 20 June 2025
Summary
CVE-2025-6336 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, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked in the top 19.0% 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 buffer overflow vulnerability exists in the TOTOLINK EX1200T wireless router running firmware version 4.1.2cu.5232_B20210713. The flaw resides in an unknown function within the /boafrm/formTmultiAP file of the HTTP POST Request Handler component, where improper handling of the submit-url argument allows an attacker to overflow a buffer. The issue is tracked under CWE-119 and CWE-120 and carries a CVSS 4.0 score of 7.4.
An authenticated remote attacker can send a crafted HTTP POST request to the affected endpoint, leading to arbitrary code execution or a denial of service on the device. The vulnerability can be triggered over the network without user interaction, and a proof-of-concept exploit has already been published.
Public references consist of a GitHub repository containing exploit details and multiple Vuldb entries; no vendor advisory or firmware update addressing the flaw is referenced in the available sources. The associated EPSS score remains low at approximately 0.014, with negligible movement since disclosure.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2025-18737
Vulnerability details
A vulnerability was found in TOTOLINK EX1200T 4.1.2cu.5232_B20210713. It has been classified as critical. Affected is an unknown function of the file /boafrm/formTmultiAP 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 launch 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?
Remote buffer overflow in router's HTTP POST handler (/boafrm/formTmultiAP) via 'submit-url' enables exploitation of public-facing web application for initial access (T1190), exploitation of remote services for code execution or access (T1210), and application exploitation for denial of service (T1499.004).
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.