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Signals Exploited in the wild (KEV) 0 Patch available 0 No fix listed 2 Has CVE 2

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Requirements No authentication 0 No user interaction 2

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Weakness (CWE) CWE-23 Relative Path Traversal 1 CWE-77 Improper Neutralization of Special Elements used in a Command 1

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Vendor: Yealink × Component: Sip-t21(p)e2 Firmware × Clear all filters

TI-2025-41051 CVE-2025-66738 · GHSA-x2hf-qg23-rjpx

An issue in Yealink T21P_E2 Phone 52.84.0.15 allows a remote normal privileged attacker…

Priority HIGH 73

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.

CVSS 3.1HIGH 8.8· Network · Low privileges · No interaction · EPSS 0.006 · Published 2025-12-26 · No fix listed CWE-77

TI-2025-41050 CVE-2025-66737 · GHSA-8cpr-48rw-5rrc

Yealink T21P_E2 Phone 52.84.0.15 is vulnerable to Directory Traversal.

Priority MEDIUM 53

Yealink T21P_E2 Phone 52.84.0.15 is vulnerable to Directory Traversal.

CVSS 3.1MEDIUM 4.3· Network · Low privileges · No interaction · EPSS 0.00661 · Published 2025-12-26 · No fix listed CWE-23

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