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Warning about a hacked version of VosViewer—only downloads from August 31, 2026, are affected.

Black skull © Karolin Kriesch​/​TU Dortmund
Warning about a hacked version of VosViewer — only downloads from August 31, 2026, are affected.

If you have downloaded VOSviewer—a tool developed by the CWTS at Leiden University for analyzing bibliometric networks— on August 31, 2026, between 3:30 a.m. and 1:20 p.m., from the manufacturer’s website, immediately disconnect your computer from the TU network and contact the SIC at the ITMC.

The manufacturer’s download page is currently blocked, and the incident is being investigated there.