CVE-2026-12219
MediumCVSS 6.3Exploitation Probability (EPSS)
Elevated risk61th percentile - higher than 61% of all known CVEs
Summary
A vulnerability has been found in Yealink SIP-T46U version 108.86.0.118, allowing command injection in the mod_diagnose.CommandShellByType function of /api/diagnosis/start. The attack can be launched remotely by manipulating the Time argument. The issue is fixed in version 108.87.0.23.
Risk Assessment
A remote attacker can execute arbitrary commands on the device, potentially leading to phone takeover and call eavesdropping.
Recommendation
Immediately update the phone firmware to version 108.87.0.23 or later.
Other vulnerabilities in Yealink SIP-T46U
See all- CVE-2026-12223Medium
A vulnerability in Yealink SIP-T46U 108.86.0.118. The mod_webd.TFTPUploadIperf function in /api/inner/tftpuploadiperf of the Web FastCGI Service component allows command injection via ip/port arguments. Local network attack, exploit public. Fixed in version 108.87.0.23.
- CVE-2026-12222High
Vulnerability in Yealink SIP-T46U version 108.86.0.118 in the Web FastCGI Service component (mod_webd.BlueToothTest function in /api/inner/bttest). Manipulation of btMac/pin/reserved arguments leads to stack-based buffer overflow. Attack requires local network access.
- CVE-2026-12221High
Vulnerability in Yealink SIP-T46U version 108.86.0.118 in the Firmware Chunk Upload Handler component (sprintf function in /api/upgrade/upgrade). Manipulation of uid/start_offset arguments leads to stack-based buffer overflow. Attack requires local network access.
- CVE-2026-12220High
Vulnerability in Yealink SIP-T46U version 108.86.0.118 in the Firmware Chunk Upload Handler component (mod_upgrade.SparePartsUpload function in /api/upgrade/accupgradebychunk). Manipulation of uid argument leads to stack-based buffer overflow. Attack requires local network access.
- CVE-2026-12218High
Vulnerability in Yealink SIP-T46U version 108.87.50.1 in the Web FastCGI Service component (StartReportInformation function in /api/inner/beforewifitest). Manipulation of port argument leads to stack-based buffer overflow. Attack requires local network access.
Original NVD description (English source)
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.