CVE-2021-43517: Foscam FI9805E Firmware

Critical severity, CVSS 9.8. EPSS: 1.7% chance of exploitation in the next 30 days.

FOSCAM Camera FI9805E with firmware V4.02.R12.00018510.10012.143900.00000 contains a backdoor that opens Telnet port when special command is sent on port 9530.

Affected products

• Foscam FI9805E Firmware: version 4.02.r12.00018510.10012.143900.00000 only

Published 2022-04-08. Last modified 2026-06-17.