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TI-2026-85124 Aliases CVE-2026-122120GHSA-4mhp-7v9h-79h4

Unauthorized file write in Yealink Plug-in Softwares

Priority MEDIUM 41CWE-434Published · Updated

Key facts

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

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-434.

Summary

Yealink Plug-in Softwares before 2.35.219.0 contains an unauthorized file write flaw under specific scenarios, classified as CWE-434. A remote attacker without privileges or user interaction may exploit it to achieve remote code execution.

Written with Claude Haiku 5.5 from the sources below · 2026-11-04

Description from the CNA

In Yealink Plug-in Softwares before 2.35.219.0, there is an unauthorized file write vulnerability under specific scenarios, which may be exploited by attackers to achieve remote code execution.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00513 43rd percentileScored 2026-11-07
Fix Fixed Plug-in Softwares (Yealink): 2.35.219.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

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

Affected products

VendorProductAffected versionsFixed inStatusSource
YealinkPlug-in Softwaresbefore 2.35.219.02.35.219.0Patch availableCNA
  • Plug-in Softwares VendorYealink Affected before 2.35.219.0 Fixed in 2.35.219.0 Patch available CNA

Remediation

Update Yealink Plug-in Softwares to version 2.35.219.0, the fixed version.

Written with Claude Haiku 5.5 from the sources below · 2026-11-04

  • Fix · CNA Plug-in Softwares (Yealink) Fixed in 2.35.219.0

Timeline

  1. 2026-11-04 Threatist record created from CVE-2026-122120
  2. 2026-11-04 Alias added: GHSA-4mhp-7v9h-79h4
  3. 2026-11-05 CISA SSVC decision points changed
  4. 2026-11-05 Priority changed: MEDIUM → LOW
  5. 2026-11-06 Priority changed: LOW → MEDIUM

References

Other 2

  • 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