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CVE-2021-27561
CRITICALCISA KEV9.8
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.
CVE Details
CVSS v3.1 Score9.8
SeverityCRITICAL
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack VectorNETWORK
ComplexityLOW
Privileges RequiredNONE
User InteractionNONE
Published10/15/2021
Last Modified11/10/2025
Sourcekev
Honeypot Sightings0
CISA KEV
VendorYealink
ProductDevice Management
Vulnerability NameYealink Device Management Server-Side Request Forgery (SSRF) Vulnerability
KEV Date Added2021-11-03
Remediation Due Date2021-11-17
Ransomware UseUnknown
Affected Products
yealink:device_management
Weaknesses (CWE)
CWE-78CWE-78
References
https://ssd-disclosure.com/?p=4688(cve@mitre.org)
https://ssd-disclosure.com/?p=4688(af854a3a-2127-422b-91ae-364da2661108)
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-27561(134c704f-9b21-4f2e-91b3-4a467353bcc0)
IOC Correlations
No correlations recorded
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