---
title: "CVE-2026-12569: PTC Windchill and FlexPLM Improper Input Validation Vulnerability"
url: https://erroneo.us/security/cve/CVE-2026-12569/
description: "CVE-2026-12569 (PTC Windchill and FlexPLM): Exploited in the wild (CISA KEV). A critical remote code execution (RCE) vulnerability has been reported in PTC…"
type: vulnerability-record
section: "Security Digest"
date_published: 2026-06-18
date_modified: 2026-08-01
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2026-12569"
kev: true
cvss: 9.3
epss: 0.46049
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2026-12569: PTC Windchill and FlexPLM Improper Input Validation Vulnerability

**Signal:** Exploited: patch now if you run it. CISA has confirmed exploitation in the wild. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- Yes, if you run PTC Windchill and FlexPLM. CISA added this CVE to its Known Exploited Vulnerabilities catalog on 2026-06-25, which means there is reliable evidence of exploitation in the wild. US federal agencies must remediate by 2026-06-28 ; treat that as the outer limit, not the target. CISA also lists it as known to be used in ransomware campaigns .
- EPSS 46.0% , percentile 99: FIRST’s model estimates a 46.0% chance of exploitation activity in the next 30 days, higher than 99% of all scored CVEs (very high). EPSS is a probability, not a verdict.
- Remotely reachable with no login and no user interaction. If the vulnerable service is exposed to the internet, prioritize 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 products (CVE record)

- PTC Windchill PDMLink: <= 11.0 M030, 11.1 M020, 11.2.1.0, 12.0.2.0, 12.1.2.0, 13.0.2.0, 13.1.0.0, 13.1.1.0, 13.1.2.0, 13.1.3.0
- PTC FlexPLM: <= 11.0 M030, 11.1 M020, 11.2.1.0, 12.0.0.0, 12.0.2.0, 12.1.2.0, 12.1.3.0, 13.0.2.0, 13.0.3.0

## Severity

- PTC CVSS 4.0: 9.3 `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/AU:Y/R:U/V:C/U:Red`

## Exploitation

- CISA KEV: added 2026-06-25; federal due date 2026-06-28. Known ransomware use: Known.
- CISA 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.
- CISA SSVC assessment: exploitation active , automatable yes , technical impact total .
- FIRST EPSS (model of 2026-10-21): 46.05% probability of exploitation activity in the next 30 days; percentile 99.

## Sources

- [ptc.com](https://www.ptc.com/en/support/article/CS473270)
- [CVE.org record CVE-2026-12569](https://www.cve.org/CVERecord?id=CVE-2026-12569)
- [NVD entry CVE-2026-12569](https://nvd.nist.gov/vuln/detail/CVE-2026-12569)
- [CISA Known Exploited Vulnerabilities catalog entry](https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-12569)
- [Listed in CISA KEV notes (cisa.gov)](https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk)
- [Listed in CISA KEV notes (cisa.gov)](https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk)

---
Source page: https://erroneo.us/security/cve/CVE-2026-12569/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt