CVE-2026-12569
PTC Windchill and FlexPLM Improper Input Validation Vulnerability
CVSS
9.8
Critical
EPSS
46.0%
p99
KEV
YES
Jun 25, 2026
Exploit Today
80
0-100
Published: Jun 18, 2026 · Last modified: Aug 1, 2026 · CWE-20 · CWE-502
Product
PTC / Windchill and FlexPLM
Vulnerability
PTC Windchill and FlexPLM Improper Input Validation Vulnerability
Added to KEV
Jun 25, 2026
Remediate by
Jun 28, 2026
Known ransomware use
Yes
Summary description
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.
Required action
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.
Notes
https://www.ptc.com/en/support/article/CS473270 ; BOD 26-04: https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk ; Forensics Triage Requirements: https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk ; https://nvd.nist.gov/vuln/detail/CVE-2026-12569
A critical remote code execution (RCE) vulnerability has been reported in PTC Windchill PDMlink and PTC FlexPLM. The vulnerability may be exploited through the deserialization of untrusted data. * This advisory also applies to all CPS versions * The identified vulnerability also impacts Windchill and FlexPLM releases prior to 11.0 M030