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CVE-2026-12219— Yealink SIP-T46U Web FastCGI Service start mod_diagnose.CommandShellByType command injection

CVSS 6.3 · Medium EPSS 1.05% · P60

Affected Version Matrix 2

VendorProductVersion RangeStatus
YealinkSIP-T46U108.86.0.118affected
108.87.0.23unaffected
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I. Basic Information for CVE-2026-12219

Vulnerability Information
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Vulnerability Title
Yealink SIP-T46U Web FastCGI Service start mod_diagnose.CommandShellByType command injection
Source: NVD (National Vulnerability Database)
Vulnerability Description
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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
Source: NVD (National Vulnerability Database)
Vulnerability Type
在命令中使用的特殊元素转义处理不恰当(命令注入)
Source: NVD (National Vulnerability Database)
Vulnerability Title
Yealink sip-t46u 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
sip-t46u是中国Yealink公司的一款IP电话终端设备。 Yealink SIP-T46U 108.86.0.118版本存在安全漏洞，该漏洞源于Web FastCGI Service组件中文件/api/diagnosis/start的函数mod_diagnose.CommandShellByType对参数Time的操作导致命令注入，可能导致远程攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
YealinkSIP-T46U 108.86.0.118 cpe:2.3:a:yealink:sip-t46u:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-12219

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III. Intelligence Information for CVE-2026-12219

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Other References for CVE-2026-12219 (1)

Same Patch Batch · Yealink · 2026-06-15 · 6 CVEs total

CVE-2026-122208.0 HIGHYealink SIP-T46U Firmware Chunk Upload handler accupgradebychunk mod_upgrade.SparePartsUpl
CVE-2026-122188.0 HIGHYealink SIP-T46U Web FastCGI Service beforewifitest StartReportInformation stack-based ove
CVE-2026-122228.0 HIGHYealink SIP-T46U Web FastCGI Service bttest mod_webd.BlueToothTest stack-based overflow
CVE-2026-122218.0 HIGHYealink SIP-T46U Firmware Chunk Upload upgrade sprintf stack-based overflow
CVE-2026-122235.5 MEDIUMYealink SIP-T46U Web FastCGI Service tftpuploadiperf mod_webd.TFTPUploadIperf command inje

IV. Related Vulnerabilities

Same product: SIP-T46U
Same vendor: Yealink
Same weakness: CWE-77

V. Comments for CVE-2026-12219

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