What’s Vulnerable › Vulnerabilities

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

• Severity: medium (CVSS 6.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-06-15 · updated 2026-07-24
• Weakness: CWE-74

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.

Affected products

• Yealink SIP-T46U: 108.86.0.118

References

• http://cdn2.v50to.cc/T46U/T46U_mod_diagnose_CommandShellByType_iperf_time_cmd_injection.zip
• https://vuldb.com/cve/CVE-2026-12219
• https://vuldb.com/submit/834204
• https://vuldb.com/vuln/370862
• https://vuldb.com/vuln/370862/cti

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