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

CVE-2026-12569 is rated critical with a CVSS v3.1 base score of 9.8 and affects PTC Windchill and FlexPLM. Per its scoring, it can be exploited over the network, without authentication, without any user interaction. The scored impact on confidentiality, integrity and availability is the highest available. CISA added it to its Known Exploited Vulnerabilities catalog on 2026-06-25, which means exploitation in the wild has been observed.

Vulnerability description

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

Severity breakdown

CVSS v3.1 9.8: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

  • Attack vector: Network. Exploitable remotely over the network, with no need for local or physical access.
  • Attack complexity: Low. No special conditions; the attack can be repeated reliably.
  • Privileges required: None. No account or prior access is needed.
  • User interaction: None. No action from any user is needed.
  • Scope: Unchanged. Impact stays within the vulnerable component.
  • Confidentiality impact: High. Total loss of confidentiality; sensitive data can be fully disclosed.
  • Integrity impact: High. Total loss of integrity; data or system state can be fully modified.
  • Availability impact: High. Total loss of availability; the component can be shut down.

Underlying weakness

CWE-20: Improper Input Validation

The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.

CWE-502: Deserialization of Untrusted Data

The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.

Affected products

  • 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; 13.0.2.0; 13.0.3.0
  • Ptc Windchill Pdmlink: before 11.0m030; 11.0m030; 11.1m020; 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

References