November 3, 2021 · Applied Cybernetics Group
CVE-2021-27561 — Yealink Device Management
Yealink Device Management Server-Side Request Forgery (SSRF) Vulnerability
- Added to KEV
2021-11-03- Federal due date
2021-11-17- Vendor
- Yealink
- Product
- Device Management
- EPSS
- 99.9th percentile (score 0.941, as of
2026-06-08) - NVD CVSS v3.1
- —
- Ransomware use
- Unknown
- Upstream
- https://nvd.nist.gov/vuln/detail/CVE-2021-27561
CISA short description
Yealink Device Management contains a server-side request forgery (SSRF) vulnerability that allows for unauthenticated remote code execution.
Required action
Apply updates per vendor instructions.