CVE-2021-27171: Fiberhome HG6245D Firmware

Critical severity, CVSS 9.8. EPSS: 17.8% chance of exploitation in the next 30 days.

An issue was discovered on FiberHome HG6245D devices through RP2613. It is possible to start a Linux telnetd as root on port 26/tcp by using the CLI interface commands of ddd and shell (or tshell).

Affected products

• Fiberhome HG6245D Firmware: up to and including rp2613

Published 2021-02-10. Last modified 2026-06-17.