CVE-2025-66737

PoC —

CVSS 3.1

4.3 medium

EPSS

<1%p50

Published

Dec 26, 2025 (Dec 26, 2025)

Modified

Jul 5, 2026

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.

Vendors: yealink
Products: sip-t21\(p\)e2 firmware
Weakness: CWE-23
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

NVD CVE.org GitHub PoCs EPSS (0.7%)

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