PT-2025-53600 · Yealink · Yealink T21P E2 Phone

Published 2025-12-26 · Updated 2026-01-09 · CVE-2025-66737

Positive Technologies (AI Summary)

CVSS v3.1

4.3

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions Yealink T21P E2 Phone version 52.84.0.15

Description The Yealink T21P E2 Phone version 52.84.0.15 contains a directory traversal flaw. A remote attacker with normal privileges can read arbitrary files through a crafted request to the diagnostic component’s result read function.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Relative Path Traversal

Weakness Enumeration

CWE-23

Related Identifiers

CVE-2025-66737

Affected Products

Yealink T21P E2 Phone

References · 9

• 🔥 https://drive.google.com/file/d/1MpxnCL4koKupqWWDmY3ljlybjIPD8ieD/view?usp=sharing · Exploit
• https://osv.dev/vulnerability/CVE-2025-66737 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-66737 · Security Note
• https://twitter.com/CVEnew/status/2004666611890876757 · Twitter Post
• https://twitter.com/VulmonFeeds/status/2004632766806098087 · Twitter Post
• http://yealink.com · Note
• https://t.me/cveNotify/146937 · Telegram Post
• https://t.me/CVEtracker/40727 · Telegram Post
• https://t.me/cveNotify/148301 · Telegram Post