CVE-2026-5105: Totolink a3300r Firmware

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

A vulnerability was detected in Totolink A3300R 17.0.0cu.557_b20221024. The affected element is the function setVpnPassCfg of the file /cgi-bin/cstecgi.cgi of the component Parameter Handler. Performing a manipulation of the argument pptpPassThru results in command injection. It is possible to initiate the attack remotely. The exploit is now public and may be used.

Affected products

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

Published 2026-03-30. Last modified 2026-06-17.