PTC Windchill and FlexPLM Improper Input Validation Vulnerability (CVE-2026-12569)
Severity: critical · Patch status: unknown · Since 2026-06-25 · CVE-2026-12569
PTC Windchill and FlexPLM contains an improper input validation vulnerability allowing an unauthenticated, remote attacker to execute arbitrary code by sending a malicious request to the network. CISA added CVE-2026-12569 to its Known Exploited Vulnerabilities catalog on Jun 25, 2026, which means attackers are exploiting it in the wild. CISA reports known use in ransomware campaigns.
What to do
- Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
- US federal agencies must remediate by Jun 28, 2026 (BOD 22-01); treat that as the outer limit.
Sources
All live incidents on Threat Watch
