News Windchill Ransomware Attack: A Five-Step Check for Anyone Running PTC PLM Software by Rebecca Sutton August 2, 2026 by Rebecca Sutton August 2, 2026 Cl0p-linked attackers are exploiting an unauthenticated flaw in PTC Windchill and FlexPLM. Here’s a practical checklist for finding out if you’re exposed. FacebookTwitterLinkedinEmail