Is CVE-2025-66737 actively exploited?

CVE-2025-66737 has no public evidence of in-the-wild exploitation as of 2026-01-09.

What is the CVSS score for CVE-2025-66737?

CVE-2025-66737 has a CVSS score of 4.3 (MEDIUM severity). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.

How do I patch CVE-2025-66737?

Patch guidance is available from yealink security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2025-66737.

Which products are affected by CVE-2025-66737?

1 product: yealink sip-t21\(p\)e2 firmware.

CVE-2025-66737 - remediation guidance & executive summary

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 Metrics

Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Attack Vector: network
Complexity: low
Privileges: low
User Action: none
Scope: unchanged
Confidentiality: low
Integrity: none
Availability: none
Weaknesses: CWE-23

Metadata

Primary Vendor: YEALINK
Published: 12/26/2025
Last Modified: 1/9/2026
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

CVE-2025-66737

Description

CVSS Metrics

Metadata

Affected Products

Remediation Guidance

Executive Summary