Known exploited vulnerability · CISA KEV

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.

CVE-2026-12569

Exploited in the wild. Fix this first.

CISA added it to the Known Exploited Vulnerabilities catalog on 2026-06-25: attackers are using it right now. It is known to be used in ransomware campaigns.

CISA KEV: Listed; Added 2026-06-25 · federal fix-by 2026-06-28
EPSS (30 days): 46%; Higher than 99% of CVEs · 2026-11-01
CVSS v4.0: 9.3 Critical; CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:Y/R:U/V:C/RE:X/U:Red

What CISA says

PTC Windchill and FlexPLM Improper Input Validation Vulnerability

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.

NVD description · published 2026-06-18

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

Full record on NVD

Got a whole scan? Scan Hub runs this check on every finding in your Nessus, Qualys, Rapid7 or OpenVAS export and ranks the report by it.

Try it free

How to check if you are exposed to CVE-2026-12569

Find every PTC Windchill and FlexPLM system you or your clients run, including ones exposed to the internet. Those come first: CISA only lists flaws attackers are already using.
Compare each version with the fixed versions in the vendor advisory below. Where no fix exists yet, apply the vendor’s mitigation or take the system off the internet.
Run a credentialed vulnerability scan to catch the systems you missed, then check that the next scan no longer reports CVE-2026-12569.

US federal agencies had to fix this by 2026-06-28. Everyone else should treat that deadline as a guide: if it has passed, this is overdue.

Affected versions

Versions the National Vulnerability Database lists as vulnerable to CVE-2026-12569. Check the vendor advisory for the exact fixed builds before you sign anything off.

Product	Vulnerable versions
PTC Flexplm	up to and including 11.0m030; 11.1m020; 11.2.1.0; 12.0.0.0; 12.0.2.0; 12.1.3.0 and 2 more
PTC Windchill Pdmlink	before 11.0m030; 11.0m030; 11.1m020; 11.2.1.0; 12.0.2.0; 12.1.2.0 and 5 more

Timeline

2026-06-18 · Published in the National Vulnerability Database
2026-06-25 · Added to CISA's Known Exploited Vulnerabilities catalog, 7 days after it was published
2026-06-28 · Fix-by date for US federal agencies, passed 126 days ago

Vendor advisories and fixes

https://www.ptc.com/en/support/article/CS473270

Weakness type

Keep going

Sources: CISA Known Exploited Vulnerabilities catalog (version 2026.10.30); EPSS data from FIRST.org; CVSS and descriptions from the NIST National Vulnerability Database. Checked 2026-11-01. This product uses the NVD API but is not endorsed or certified by the NVD.