CVE-2026-12219: Yealink SIP-t46u

Medium severity, CVSS 6.3. EPSS: 1.1% chance of exploitation in the next 30 days.

A flaw has been found in Yealink SIP-T46U 108.86.0.118. The impacted element is the function mod_diagnose.CommandShellByType of the file /api/diagnosis/start of the component Web FastCGI Service. This manipulation of the argument Time causes command injection. The attack can be initiated remotely. The exploit has been published and may be used. Upgrading to version 108.87.0.23 is sufficient to resolve this issue. It is advisable to upgrade the affected component.

Affected products

• Yealink SIP-t46u: version 108.86.0.118 only

Published 2026-06-15. Last modified 2026-07-24.