CVE-2023-40042: Totolink t10 v2 Firmware

Critical severity, CVSS 9.8. EPSS: 1.5% chance of exploitation in the next 30 days.

TOTOLINK T10_v2 5.9c.5061_B20200511 has a stack-based buffer overflow in setStaticDhcpConfig in /lib/cste_modules/lan.so. Attackers can send crafted data in an MQTT packet, via the comment parameter, to control the return address and execute code.

Affected products

• Totolink t10 v2 Firmware: version 5.9c.5061_b20200511 only

Published 2023-08-08. Last modified 2026-06-17.