CVE-2026-1326: Totolink NR1800X Firmware

High severity, CVSS 8.8. EPSS: 3.5% chance of exploitation in the next 30 days.

A weakness has been identified in Totolink NR1800X 9.1.0u.6279_B20210910. This vulnerability affects the function setWanCfg of the file /cgi-bin/cstecgi.cgi of the component POST Request Handler. This manipulation of the argument Hostname causes command injection. The attack can be initiated remotely. The exploit has been made available to the public and could be used for attacks.

Affected products

• Totolink NR1800X Firmware: version 9.1.0u.6279_b20210910 only

Published 2026-01-22. Last modified 2026-06-17.