TeamViewer Full Client and Host vulnerabilities

Improper access control in the Patch Management update mechanism of TeamViewer Full Client and Host for Windows prior to version 15.82 allows a local authenticated attacker with low privileges to supply a signed executable through a forged IPC response and cause it to load a malicious DLL from a user-writable temporary directory. Successful exploitation results in arbitrary code execution with NT AUTHORITY\SYSTEM privileges.

An improper access control vulnerability in the IPC communication between TeamViewer Full Client or Host prior to version 15.83 and the Remote Management Monitoring component prior to version 26.10.1 allows a local authenticated attacker with low privileges to execute scripts as SYSTEM/root.

A time-of-check time-of-use (TOCTOU) race condition combined with improper symbolic link handling in the privileged helper of TeamViewer Full Client and Host prior to version 15.83 for macOS allows a local attacker with low privileges to bypass installer package verification and install a malicious package. Successful exploitation can lead to local privilege escalation to root.