CVE-2025-12240

A security vulnerability has been detected in TOTOLINK A3300R 17.0.0cu.557_B20221024. This affects the function setDmzCfg of the file /cgi-bin/cstecgi.cgi. The manipulation of the argument ip leads to buffer overflow. It is possible to initiate the attack remotely. The exploit has been disclosed publicly and may be used.

• CWE-119
• CWE-120
• CWE-120

• https://github.com/noahze01/IoT-vulnerable/blob/main/TOTOLink/A3300R/setDmzCfg.mdExploit, Third Party Advisory
• https://vuldb.com/?ctiid.329910Permissions Required, VDB Entry
• https://vuldb.com/?id.329910Third Party Advisory, VDB Entry
• https://vuldb.com/?submit.673722Third Party Advisory, VDB Entry
• https://www.totolink.net/Product

Published

Oct 27, 2025

Last Modified

Jun 17, 2026

Status

Analyzed

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
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