Name: CVE-2021-27561: Improper Neutralization of Special Elements used in an OS Command
Creator: Rapid7
Published: 2021-10-15T00:00:00.000Z
License: https://www.rapid7.com/legal/website-terms-of-use/
Keywords: CVE, CVE-2021-27561, CWE-78, Exploited in the Wild, CISA KEV Exploit, CVSS 9.8, EPSS 0.82865, CISA KEV

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 Details

CVSS 3.1 Base Score: 9.8
CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)

Covered by Rapid7

Product	Vendor Advisory	Solution File	Added	Published
Yealink Device Management	—	Upgrade Yealink Device Management to the latest version	Jul 8, 2025	Oct 15, 2021

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CVSS Details

Covered by Rapid7

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