TeamViewer Flaws Put Support Technicians' Machines at Risk

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A TeamViewer vulnerability, tracked as CVE-2026-111585, is an integer overflow in the remote desktop display component that could crash the application or allow arbitrary code execution on a viewer's machine. Exploitation requires connecting to a remote machine controlled or compromised by an attacker, so starting a support session does not eliminate the risk. The flaw carries a CVSS score of 8.8 and affects TeamViewer on Windows, macOS, Linux and Android, though TeamViewer says it has not seen it exploited in the wild. Version 15.83 includes fixes, and TeamViewer bulletin TV-2026-1011 lists updates for older releases. Additional macOS and Linux flaws, including a crafted-file code execution issue and a local root-privilege escalation on macOS, are also patched, and security firm TMGS advises prioritizing technicians' and administrators' machines for patching and investigation.

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