Directory Traversal Vulnerability in Yealink T21P_E2 Phone
CVE-2025-66737

4.3MEDIUM

Key Information:

Vendor

Yealink

Status
T21P_E2 Phone
Vendor
CVE Published:
26 December 2025

What is CVE-2025-66737?

The Yealink T21P_E2 Phone version 52.84.0.15 exhibits a significant Directory Traversal vulnerability. This issue allows an authenticated attacker with normal privileges to exploit a flaw in the diagnostic component's read function, enabling them to read arbitrary files on the device. As a result, sensitive information may be accessed, posing potential security risks. Organizations utilizing this product should take immediate steps to mitigate any risks associated with this vulnerability.

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References

http://yealink.com
https://drive.google.com/file/d/1MpxnCL4koKupqWWDmY3ljlyb...

CVSS V3.1

Score:
4.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
None
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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