Yealink Device Management (DM) 3.6.0.20 allows command injection as root via the /sm/api/v1/firewall/zone/services URI, without authentication.
Published 2021-10-15 18:15:07
Updated 2022-06-28 14:11:45
Source MITRE
View at NVD,   CVE.org
Vulnerability category: Server-side request forgery (SSRF)

CVE-2021-27561 is in the CISA Known Exploited Vulnerabilities Catalog

CISA vulnerability name:
Yealink Device Management Server-Side Request Forgery (SSRF) Vulnerability
CISA required action:
Apply updates per vendor instructions.
CISA description:
Yealink Device Management contains a server-side request forgery (SSRF) vulnerability that allows for unauthenticated remote code execution.
Added on 2021-11-03 Action due date 2021-11-17

Exploit prediction scoring system (EPSS) score for CVE-2021-27561

97.44%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 100 %
Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2021-27561

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
10.0
HIGH AV:N/AC:L/Au:N/C:C/I:C/A:C
10.0
10.0
NIST
9.8
CRITICAL CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
3.9
5.9
NIST

CWE ids for CVE-2021-27561

  • The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination.
    Assigned by: nvd@nist.gov (Primary)

References for CVE-2021-27561

Products affected by CVE-2021-27561

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