CVE-2021-27561
CVE-2021-27561
In short
Yealink Device Management allows attackers to run commands with root privileges without logging in, through a specific web address. This lets attackers take complete control of the device.
Technical detail
An unauthenticated remote attacker can inject arbitrary OS commands via the /sm/api/v1/firewall/zone/services endpoint in Yealink DM 3.6.0.20, resulting in code execution with root privileges. The vulnerability stems from insufficient input validation on user-supplied parameters passed to system command execution functions (CWE-78 OS Command Injection).
Summary generated and translated by AI from the official description.
Yealink Device Management (DM) 3.6.0.20 allows command injection as root via the /sm/api/v1/firewall/zone/services URI, without authentication.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected products
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