TeamViewer Flaw Lets Remote Computers Attack Users Who Connect to Control Them

A critical vulnerability in TeamViewer, tracked as CVE-2026-111585, allows a malicious or compromised host to attack the viewer's machine during a remote session. The flaw stems from an integer overflow when processing screen size data, leading to insufficient memory allocation and subsequent out-of-bounds memory writes. This can result in crashes or, on certain platforms like Windows, remote code execution. The vulnerability affects TeamViewer versions prior to 15.83 across Windows, Linux, macOS, and Android, with no known in-the-wild exploitation reported at the time of disclosure.

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