CVE-2021-27561
CVSS v3
9.8
CRITICAL
EPSS Score
94.1 %
exploit probability
CISA KEV
Yes
known exploited
Exploitation
—
SSVC status
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.
CISA Known Exploited Vulnerability
- Date Added
- 2021-11-03
- Patch Due Date
- 2021-11-17
- Ransomware Use
- Unknown
Technical details
- Published
- 2021-10-15
Frequently asked questions
What is CVE-2021-27561?
Yealink Device Management (DM) 3.6.0.20 allows command injection as root via the /sm/api/v1/firewall/zone/services URI, without authentication.
Is CVE-2021-27561 actively exploited?
Yes. CVE-2021-27561 is on the CISA Known Exploited Vulnerabilities (KEV) catalog, meaning it has been confirmed as actively exploited in the wild. CISA requires federal agencies to patch by 2021-11-17.
What is the CVSS score for CVE-2021-27561?
CVE-2021-27561 has a CVSS v3 base score of 9.8 (CRITICAL severity).
Is CVE-2021-27561 affecting your environment?
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