CVE-2018-16217: Yealink Ultra-Elegant IP Phone SIP-t41p Firmware

High severity, CVSS 8.8. EPSS: 3.3% chance of exploitation in the next 30 days.

The network diagnostic function (ping) in the Yeahlink Ultra-elegant IP Phone SIP-T41P (firmware 66.83.0.35) allows a remote authenticated attacker to trigger OS commands or open a reverse shell via command injection.

Affected products

• Yealink Ultra-Elegant IP Phone SIP-t41p Firmware: version 66.83.0.35 only

Published 2019-05-29. Last modified 2026-06-17.