Live › vulnerability › CVE-2021-27561
Go to dashboardYealink Device Management (DM) <= 3.6.0.20 allows unauthenticated command injection as root via /sm/api/v1/firewall/zone/services (CVSS 9.8). CISA KEV names it an SSRF, but the vendor and NVD describe OS command injection, giving unauthenticated RCE. Fixed in 3.6.0.31. Exploited in the wild per CISA KEV.
Summary written from the sources below. Check the originals before acting.
First seen by InfraStack 2026-10-23 19:11 UTC, 0h before NVD. All times on this page are UTC.
Apply updates per vendor instructions.
| Product | Ecosystem | Affected | Fixed in |
|---|---|---|---|
| Yealink Device Management | vendor | – | – |
| Yealink Device Management | vendor | <= 3.6.0.20 | 3.6.0.31 |
3.6.0.20 is vulnerable3.6.0.31 or later (download via https://support.yealink.com/en/portal/home)Each row is the first time that source carried this signal. The analyst’s rows are its own findings.
Yealink Device Management contains a server-side request forgery (SSRF) vulnerability that allows for unauthenticated remote code execution.
CISA required action: Apply updates per vendor instructions.
This page as .md · .json · in your agent: get_signal("CVE-2021-27561")
CISA KEV catalog, Creative Commons 0 · EPSS scores by FIRST, used with attribution · NVD data is provided by NIST and is public domain. Posts quoted belong to their authors.