CVE-2021-27561 - Vulnerability Details - OpenCVE

Yealink Device Management (DM) 3.6.0.20 allows command injection as root via the /sm/api/v1/firewall/zone/services URI, without authentication.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

Access Vector Network

Access Complexity Low

Authentication None

Confidentiality Impact Complete

Integrity Impact Complete

Availability Impact Complete

This CVE is in the KEV database since Nov. 3, 2021.

The EPSS score is 0.94106.

Exploitation active

Automatable yes

Technical Impact total

Vendors	Products
Yealink	Device Management

Configuration 1 [-]

cpe:2.3:a:yealink:device_management:*:*:*:*:*:*:*:*

No data.

No data.

Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References

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

History

Wed, 22 Oct 2025 00:30:00 +0000

Type	Values Removed	Values Added
References		https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-27561

Tue, 21 Oct 2025 20:30:00 +0000

Type	Values Removed	Values Added
References	https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-27561

Tue, 21 Oct 2025 19:30:00 +0000

Type	Values Removed	Values Added
References		https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-27561

Tue, 04 Feb 2025 20:15:00 +0000

Type	Values Removed	Values Added
Metrics		kev `{'dateAdded': '2021-11-03'}` ssvc `{'options': {'Automatable': 'yes', 'Exploitation': 'active', 'Technical Impact': 'total'}, 'version': '2.0.3'}`

MITRE

Status: PUBLISHED

Assigner: mitre

Published: 2021-10-15T17:11:45.000Z

Updated: 2025-10-21T23:25:28.403Z

Reserved: 2021-02-22T00:00:00.000Z

Link: CVE-2021-27561

Vulnrichment

Updated: 2024-08-03T21:26:09.742Z

NVD

Status : Modified

Published: 2021-10-15T18:15:07.490

Modified: 2025-10-22T00:17:29.520

Link: CVE-2021-27561

Redhat

No data.

OpenCVE Enrichment

No data.

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