Vulnerability · Published Oct 27, 2025 · Assigned by VulDB
CVE-2025-12241TOTOLINK A3300R POST Parameter cstecgi.cgi setLanguageCfg stack-based overflow
High 8.8
In plain English
A high-severity stack buffer overflow in A3300R from TOTOLINK. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 1.0% (higher than 64% of all known vulnerabilities).
Severity (CVSS 3.1)8.8High
Exploit odds (30 days)1.0%top 36.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
A vulnerability was detected in TOTOLINK A3300R 17.0.0cu.557_B20221024. This impacts the function setLanguageCfg of the file /cgi-bin/cstecgi.cgi of the component POST Parameter Handler. The manipulation of the argument lang results in stack-based buffer overflow. It is possible to launch the attack remotely. The exploit is now public and may be used.
Affected products (as reported)
Weakness: CWE-121, CWE-119 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R
References
- VDB-329911 | TOTOLINK A3300R POST Parameter cstecgi.cgi setLanguageCfg stack-based overflow vdb-entry, technical-description
- VDB-329911 | CTI Indicators (IOB, IOC, IOA) signature, permissions-required
- Submit #673723 | TOTOLINK A3300R V17.0.0cu.557_B20221024 Buffer Overflow third-party-advisory
- https://github.com/noahze01/IoT-vulnerable/blob/main/TOTOLink/A3300R/setLanguageCfg.md exploit
- https://www.totolink.net/ product