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TI-2026-10511 Aliases CVE-2026-12219GHSA-85r6-756v-4x2v

Yealink SIP-T46U Web FastCGI Service start mod_diagnose.CommandShellByType command injection

Priority LOW 26CWE-74Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Code execution
Confidentiality · integrity · availability
Low · Low · Low
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-77.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0105 64th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix Fixed SIP-T46U (Yealink): 108.87.0.23

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
YealinkSIP-T46U108.86.0.118108.87.0.23Patch availableCNA
  • SIP-T46U VendorYealink Affected 108.86.0.118 Fixed in 108.87.0.23 Patch available CNA

CPE names CNA · 1

CPEVersionsRoleVendor
cpe:2.3:a:yealink:sip-t46u:*:*:*:*:*:*:*:*——Yealink
  • cpe:2.3:a:yealink:sip-t46u:*:*:*:*:*:*:*:* Versions — — ·Yealink

Remediation

  • Fix · CNA SIP-T46U (Yealink) Fixed in 108.87.0.23

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-12219
  2. 2026-10-03 Alias added: GHSA-85r6-756v-4x2v

References

Exploit 1

  • TI-2021-09018 Yealink Device Management (DM) 3.6.0.20 allows command injection as root via the… KEVCVSS 3.1CRITICAL 9.8
  • TI-2025-41051 An issue in Yealink T21P_E2 Phone 52.84.0.15 allows a remote normal privileged attacker… CVSS 3.1HIGH 8.8
  • TI-2023-23573 An issue in YeaLinkSIP-T19P-E2 v.53.84.0.15 allows a remote privileged attacker to… CVSS 3.1HIGH 8.8
  • TI-2026-10514 Yealink SIP-T46U Web FastCGI Service bttest mod_webd.BlueToothTest stack-based overflow CVSS 4.0HIGH 8.6
  • TI-2026-10512 Yealink SIP-T46U Firmware Chunk Upload handler accupgradebychunk mod_upgrade.SparePartsUpload stack-based overflow CVSS 4.0HIGH 8.6
  • TI-2026-10510 Yealink SIP-T46U Web FastCGI Service beforewifitest StartReportInformation stack-based overflow CVSS 4.0HIGH 8.6
See all 42 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences