Deserialization in Ptc Flexplm

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 v…

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

EPSS: 0.023 (81.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Weakness classification (CWE)

CISA KEV (Known Exploited Vulnerabilities)

This CVE is on the CISA KEV catalog, added on . CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.

BOD 22-01 due date: .

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.

Known ransomware campaign use: yes.

References

Frequently asked questions

What is CVE-2026-12569?
CVE-2026-12569 is a critical-severity vulnerability in Ptc Flexplm, classified under Improper Input Validation. CVSS score: 9.8/10. Published 2026-06-18.
How severe is CVE-2026-12569?
Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2026-12569 known to be exploited?
Yes. CVE-2026-12569 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2026-06-25), indicating it is being actively exploited.