---
id: "CVE-2026-122120"
kind: "vulnerability"
aliases: ["CVE-2026-122120"]
title: "Yealink plug-in software: unauthorized file write enables remote code execution"
severity: "critical"
cvss: 9.0
epss: null
exploited: false
status: "open"
category: "other"
products: []
ecosystems: []
tags: ["other", "plug-in", "yealink"]
not_affected_if: ["version-2.35.219.0-or-later"]
published_at: "2026-11-04T19:17:39+00:00"
first_seen_at: "2026-11-04T19:28:48+00:00"
updated_at: "2026-11-04T19:30:06+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-122120", "first_seen_at": "2026-11-04T19:28:48+00:00"}]
---

# Yealink plug-in software: unauthorized file write enables remote code execution

Yealink Plug-in Softwares before 2.35.219.0 allow an unauthorized file write under specific scenarios. An attacker can use this to achieve remote code execution.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check the installed Yealink Plug-in Software version against the fixed version `2.35.219.0`

## Fix

- Yealink Plug-in Software: `2.35.219.0` or later

## Timeline

- 2026-11-04T19:28:48+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-122120

## From the sources

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.

---

_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_