CVE-2021-27561

State: Published
Severity: 9.8 Critical
Published: Oct 15, 2021
Updated: Oct 21, 2025
Reserved: Feb 22, 2021

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.

Scores

CVSS	Score	Vector	Source
3.1	9.8 Critical	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	CISA-ADP

Weaknesses

CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

Affected Products

Product	Versions
n/an/a	n/aAffected

References

https://ssd-disclosure.com/?p=4688
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-27561government-resource

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.