What is CVE-2026-122120?

CVE-2026-122120 is a critical-severity vulnerability in Yealink Plug-In Softwares, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 9.0/10. Published 2026-11-04.

How severe is CVE-2026-122120?

Critical severity. CVSS v3 base score is 9.0 out of 10.

Arbitrary file upload in Yealink Plug-In Softwares

CVE-2026-122120

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.

Vulnerability class: Unrestricted File Upload

Published 2026-11-04 · last modified 2026-11-05.

CVSS v3 metric

CVSS v3 base score 9.0 (Critical). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Yealink Plug-In Softwares

Weakness classification (CWE)

CWE-434 — Unrestricted Upload of File with Dangerous Type

References

Frequently asked questions

What is CVE-2026-122120?: CVE-2026-122120 is a critical-severity vulnerability in Yealink Plug-In Softwares, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 9.0/10. Published 2026-11-04.
How severe is CVE-2026-122120?: Critical severity. CVSS v3 base score is 9.0 out of 10.