Improper access control in TeamViewer Remote Full Client for Windows and TeamViewer Full Client for macOS - #VU135917
Published: June 30, 2026 / Updated: July 1, 2026
Vulnerability identifier: #VU135917
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: N/A
CWE-ID: CWE-284
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: TeamViewer
Affected software:
TeamViewer Remote Full Client for Windows
TeamViewer Full Client for macOS
TeamViewer Remote Full Client for Windows
TeamViewer Full Client for macOS
Detailed vulnerability description
The vulnerability allows a remote attacker to compromise the confidentiality, integrity, or availability of the application.
The vulnerability exists due to improper access control in out-of-session chat functionality when handling chat interactions outside an active session. A remote attacker can interact with the out-of-session chat feature to compromise the confidentiality, integrity, or availability of the application.
Remediation
Install security update from vendor's website.