CVE-2026-19844: Totolink a800r

High severity, CVSS 8.8. EPSS: 0.9% chance of exploitation in the next 30 days.

A vulnerability was found in TOTOLINK A800R 4.1.2cu.5137_B20200730. The impacted element is the function setRadvdCfg of the file /cgi-bin/cstecgi.cgi of the component ipv6.so. Performing a manipulation of the argument radvdinterfacename results in stack-based buffer overflow. It is possible to initiate the attack remotely. The exploit has been made public and could be used.

Affected products

• Totolink a800r: version 4.1.2cu.5137_B20200730 only

Published 2026-08-14. Last modified 2026-08-18.