CVE-2021-27561
CriticalActively exploited (CISA KEV)
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.
SeverityCritical
CVSS9.8
Exploit probability100. percentile82.9%
ProductYealink Device Management
PublishedOct 15, 2021
First seenOct 15, 2021
Added to KEVNov 3, 2021
Weakness typeCWE-78OS command injection
How to fix
CISA required action
Apply updates per vendor instructions.
CISA due date: Nov 17, 2021Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| yealink device_management | v ≤ 3.6.0.20 | — |
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