CVE-2026-5176: Totolink a3300r Firmware

Critical severity, CVSS 9.8. EPSS: 3% chance of exploitation in the next 30 days.

A security flaw has been discovered in Totolink A3300R 17.0.0cu.557_b20221024. Affected is the function setSyslogCfg of the file /cgi-bin/cstecgi.cgi. Performing a manipulation of the argument provided results in command injection. The attack may be initiated remotely. The exploit has been released to the public and may be used for attacks.

Affected products

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

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