Description
Yealink T21P_E2 Phone 52.84.0.15 is vulnerable to Directory Traversal. A remote normal privileged attacker can read arbitrary files via a crafted request result read function of the diagnostic component.
Scores
CVSS v3
4.3
EPSS
0.0003
EPSS Percentile
7.4%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
no
Technical Impact
partial
Details
CWE
CWE-23
Status
published
Products (1)
yealink/sip-t21\(p\)e2_firmware
52.84.0.15
Published
Dec 26, 2025
Tracked Since
Feb 18, 2026