PT-2025-26529 · Yealink · Yealink Ymcs

Jeroen Hermans + 1 · Published 2025-06-21 · Updated 2025-07-10 · CVE-2025-52918

Positive Technologies (AI Summary)

CVSS v3.1

5.0

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions: Yealink YMCS versions prior to 2025-05-26

Description: The issue allows unauthorized access to deactivated interfaces due to the lack of prevention of OpenAPI access by frozen enterprise accounts.

Recommendations: For Yealink YMCS versions prior to 2025-05-26, consider restricting access to OpenAPI until a fix is applied to prevent unauthorized access by frozen enterprise accounts.

Fix

Incorrect Authorization

Weakness Enumeration

CWE-863

Related Identifiers

CVE-2025-52918

Affected Products

Yealink Ymcs

References · 9

• https://nvd.nist.gov/vuln/detail/CVE-2025-52918 · Security Note
• https://t.me/cvetracker/26767 · Telegram Post
• https://twitter.com/transilienceai/status/1936635633533091967 · Twitter Post
• https://support.yealink.com/en/portal/knowledge/show?id=646b44278ef325311f38303f · Note
• https://twitter.com/CVEnew/status/1936567691843919993 · Twitter Post
• https://seclists.org/fulldisclosure/2025/Jun/20 · Note
• https://yealink.com/en/trust-center/security-advisories/1318c5efb82e4526 · Note
• https://t.me/cvenotify/128430 · Telegram Post
• https://dnip.ch/2025/06/25/yealink-voip-phones-insecurity-by-design · Note