CVE-2025-66737

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.

CVSS v3.1 Score

4.3

MEDIUM

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

Weakness Type (CWE)

CWE-23 CWE-23

Affected Products

Vendor	Product	Versions
yealink	sip-t21$p$e2_firmware	All
yealink	sip-t21$p$e2	All

References

Exploits

https://drive.google.com/file/d/1MpxnCL4koKupqWWDmY3ljlybjIPD8ieD/view?usp=sharing

Other References

http://yealink.com

Frequently Asked Questions

What is CVE-2025-66737? +

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. It has a CVSS v3.1 base score of 4.3 (MEDIUM).

How severe is CVE-2025-66737? +

CVE-2025-66737 has a CVSS v3.1 score of 4.3 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2025-66737? +

CVE-2025-66737 affects products from yealink, specifically: sip-t21$p$e2, sip-t21$p$e2_firmware. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-66737? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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