CVE-2026-12223
MediumCVSS 5.5Exploitation Probability (EPSS)
Elevated risk64th percentile — higher than 64% of all known CVEs
Summary
A command injection vulnerability was found in Yealink SIP-T46U version 108.86.0.118 in the mod_webd.TFTPUploadIperf function of the /api/inner/tftpuploadiperf file. The attack requires local network access and can be executed by manipulating the ip/port arguments. The vendor has provided a fix in version 108.87.0.23, which is not yet publicly available.
Risk Assessment
The risk involves the possibility of remote command execution on the phone system by an attacker on the local network, which could lead to device takeover and potential network propagation.
Recommendation
It is recommended to immediately update the phone firmware to version 108.87.0.23 once publicly available, and restrict access to the device management interface to trusted networks only.
Original NVD description (English source)
A vulnerability was identified in Yealink SIP-T46U 108.86.0.118. Affected by this vulnerability is the function mod_webd.TFTPUploadIperf of the file /api/inner/tftpuploadiperf of the component Web FastCGI Service. The manipulation of the argument ip/port leads to command injection. The attack needs to be initiated within the local network. The exploit is publicly available and might be used. Upgrading to version 108.87.0.23 addresses this issue. Upgrading the affected component is recommended. The vendor explains: "It has been fixed (...) for our technical support branch. However, please note that this specific support branch firmware is not publicly released yet."