CVE-2025-9935: Totolink n600r Firmware

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

A vulnerability was determined in TOTOLINK N600R 4.3.0cu.7866_B20220506. This vulnerability affects the function sub_4159F8 of the file /web_cste/cgi-bin/cstecgi.cgi. Executing manipulation can lead to command injection. The attack can be executed remotely. The exploit has been publicly disclosed and may be utilized.

Affected products

• Totolink n600r Firmware: version 4.3.0cu.7866_b20220506 only

Published 2025-09-04. Last modified 2026-06-17.