CVE-2025-66738

HIGH

Yealink T21P_E2 Phone 52.84.0.15 - RCE

Title source: llm
STIX 2.1

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.

References (2)

Core 2

Scores

CVSS v3 8.8
EPSS 0.0060
EPSS Percentile 43.7%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact total

Details

CWE
CWE-77
Status published
Products (1)
yealink/sip-t21\(p\)e2_firmware 52.84.0.15
Published Dec 26, 2025
Tracked Since Feb 18, 2026