CVE-2025-66738 — HIGH (8.8)

Vulnerability 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.

CVSS Score

8.8

HIGH

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

HIGH

Availability

HIGH

Affected Products

Vendor	Product	Versions
Yealink	Sip-T21\(P\)E2 Firmware	52.84.0.15
Yealink	Sip-T21\(P\)E2	-

Related Weaknesses (CWE)

CWE-77

References

FAQ

What is CVE-2025-66738?

CVE-2025-66738 is a vulnerability with a CVSS score of 8.8 (HIGH). 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.

How severe is CVE-2025-66738?

CVE-2025-66738 has been rated HIGH with a CVSS base score of 8.8/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2025-66738?

Check the references section above for vendor advisories and patch information. Affected products include: Yealink Sip-T21\(P\)E2 Firmware, Yealink Sip-T21\(P\)E2.