CVE-2026-5178: Totolink a3300r Firmware

High severity, CVSS 8.8. EPSS: 3.6% chance of exploitation in the next 30 days.

A security vulnerability has been detected in Totolink A3300R 17.0.0cu.557_b20221024. Affected by this issue is the function setIptvCfg of the file /cgi-bin/cstecgi.cgi. The manipulation of the argument vlanPriLan3 leads to command injection. Remote exploitation of the attack is possible. The exploit has been disclosed publicly and may be used.

Affected products

• Totolink a3300r Firmware: version 17.0.0cu.557_b20221024 only

Published 2026-03-31. Last modified 2026-06-17.