CVE-2026-12569 PTC Windchill and FlexPLM Improper Input Validation Vulnerability
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.
From the CISA KEV catalogue version 2026.11.06, with Cybergen analysis. Updated 6 Nov 2026.
Should You Worry?
- CISA confirmed exploitation in the wild and added it to the Known Exploited Vulnerabilities catalogue on 25 Jun 2026.
- CISA lists it as known to be used in ransomware campaigns.
- Rated Critical severity (CVSS 9.3, scored by Vendor).
- It has been in the catalogue for 134 days. Systems still unpatched now have almost certainly been scanned for it.
What It Is
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
Affected Versions
| Product | Versions |
|---|---|
| PTC Windchill PDMLink | 11.0 M030 and earlier 11.1 M020 11.2.1.0 12.0.2.0 12.1.2.0 13.0.2.0 |
| PTC FlexPLM | 11.0 M030 and earlier 11.1 M020 11.2.1.0 12.0.0.0 12.0.2.0 12.1.2.0 |
From the public CVE record, as supplied by the vendor. Always confirm against the vendor advisory.
What To Do Now
- 1
Find it
Search your asset inventory and external attack surface for PTC Windchill and FlexPLM. Include cloud images, appliances and anything a supplier runs for you.
Attack Surface Management - 2
Fix it
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.
Vulnerability Management - 3
Hunt for compromise
If an affected system was reachable before you patched, assume it may have been hit. Check logs, new accounts, web shells and outbound connections from the date of exposure.
Incident Response - 4
Prove it is fixed
Rescan or test the system after patching. Upgrades that fail silently and forgotten secondary instances are common.
Penetration Testing
The Compliance Clock
General guidance, not legal advice. Your obligations depend on your sector, scope and jurisdiction.
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