CVE-2026-1143: Totolink a3700r Firmware

High severity, CVSS 8.8. EPSS: 0.7% chance of exploitation in the next 30 days.

A weakness has been identified in TOTOLINK A3700R 9.1.2u.5822_B20200513. This affects the function setWiFiEasyGuestCfg of the file /cgi-bin/cstecgi.cgi. Executing a manipulation of the argument ssid can lead to buffer overflow. The attack may be launched remotely. The exploit has been made available to the public and could be used for attacks.

Affected products

• Totolink a3700r Firmware: version 9.1.2u.5822_b20200513 only

Published 2026-01-19. Last modified 2026-06-17.