CVE-2026-5853: Totolink a7100ru

Critical severity, CVSS 9.8. EPSS: 3.3% chance of exploitation in the next 30 days.

A security vulnerability has been detected in Totolink A7100RU 7.4cu.2313_b20191024. Affected by this vulnerability is the function setIpv6LanCfg of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. Such manipulation of the argument addrPrefixLen leads to os command injection. The attack may be performed from remote. The exploit has been disclosed publicly and may be used.

Affected products

• Totolink a7100ru: version 7.4cu.2313_b20191024 only

Published 2026-04-09. Last modified 2026-06-17.