# CVE-2026-122120: Yealink Plug-in Softwares unauthorized file write vulnerability

Source: https://junglewise.ai/threats/cve-2026-122120-in-yealink-plug-in-softwares-before-2-35-219-0-there-is-an  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-11-04. Updated: 2026-11-04  
License: CC BY 4.0 with a link back

CVE-2026-122120 · Severity: critical · CVSS 9 · Published 2026-11-04

Yealink Plug-in Softwares, used in collaboration devices and integrations, contains an unauthorized file write vulnerability that allows attackers to execute arbitrary code remotely. Exploitation could compromise video conferencing systems and meeting room devices, potentially giving attackers control over communication infrastructure.

Vendors: [Yealink](https://junglewise.ai/threats/vendors/yealink).

## Quick answers

**Is CVE-2026-122120 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-122120 being exploited in the wild.

**How severe is CVE-2026-122120?** Critical severity, with a CVSS score of 9, published 4 November 2026.

**Which products and versions are affected?** Yealink Plug-in Softwares before 2.35.219.0.

**Is there a fix for CVE-2026-122120?** Yes: fixed in 2.35.219.0. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-122120 attacked?** It is attacked over the network, in a hosted service.

**Am I affected by CVE-2026-122120?** Check whether you run Yealink Plug-in Softwares at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- Fixed in 2.35.219.0

## Technical details

An unauthorized file write vulnerability in Yealink Plug-in Softwares before 2.35.219.0 allows remote code execution under specific scenarios. The vulnerability permits attackers to write files to the system, leading to arbitrary code execution. No authentication or special user interaction appears to be required for exploitation.

## Affected products

- Yealink Plug-in Softwares before 2.35.219.0

## Timeline

- 2026-11-04: disclosed

## References

- [https://support.yealink.com/product-detail/0198a686-f259-7994-bd17-7f9d88c3359a](https://support.yealink.com/product-detail/0198a686-f259-7994-bd17-7f9d88c3359a)
- [https://www.yealink.com/en/trust-center/security-bulletins/yealink-plugin-softwares-remote-code-execution-vulnerability](https://www.yealink.com/en/trust-center/security-bulletins/yealink-plugin-softwares-remote-code-execution-vulnerability)