CVE-2025-66738
High
Description
An issue in Yealink T21P_E2 Phone 52.84.0.15 allows a remote normal privileged attacker to execute arbitrary code via a crafted request the ping function of the diagnostic component.
SeverityHigh
CVSS8.8
Exploit probability—
ProductYealink Sip-t21\(p\)e2 Firmware
PublishedDec 26, 2025
First seenDec 26, 2025
Weakness typeCWE-77Command injection
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| yealink sip-t21\(p\)e2_firmware | 52.84.0.15 | — |
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