Security AlertHigh
TeamViewer flaw could let hostile hosts run code on viewer PCs
Oct 30, 2026 · Summarized by Fundy Tech from SecurityWeek
The 30-second version
A high-severity TeamViewer bug could let a malicious host crash or take over a support technician’s computer. Version 15.83 includes patches.
Key points
- CVE-2026-111585 affects TeamViewer clients on Windows, macOS, Linux and Android.
- Exploitation needs a remote-control session to an attacker-controlled or compromised host.
- TeamViewer says version 15.83 contains the needed fixes.
Why it matters
Small businesses often use remote support tools for IT help. This flaw could put a technician’s device at risk during a normal support session.
Who’s affected: TeamViewer users and support technicians
What to do
- Update TeamViewer clients to version 15.83.
- Limit remote sessions to trusted hosts.
- Apply the legacy updates if you use older versions.
Vulnerability IDs
Original reporting
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