CVE intelligence and bounded remediation

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

Critical CVSS 9.8 CISA KEV

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
Critical
CVSS
9.8 (3.1)
Published
2026-06-18
CISA KEV
Known exploited
Ecosystem
software/application
Weaknesses
CWE-20, CWE-502

Affected products

  • ptc / flexplm
  • ptc / flexplm / 11.1m020
  • ptc / flexplm / 11.2.1.0
  • ptc / flexplm / 12.0.0.0
  • ptc / flexplm / 12.0.2.0
  • ptc / flexplm / 12.1.3.0

Showing 6 representative product identities from 19 source matches. Confirm exact affected versions with the linked vendor and NVD evidence.

Matched remediation archetype

Unsafe deserialization and object reconstruction

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Check exposure

  • Inventory serialization formats accepted from requests, queues, caches, files, cookies, and cross-service messages.
  • Trace whether untrusted input can select classes, types, callbacks, constructors, or object hooks during decoding.
  • Identify signing, schema validation, trust-boundary, and compatibility settings for each decoder.

Remediate safely

  • Replace native object deserialization with a data-only format and explicit schema validation.
  • If replacement is not immediate, use a safe decoder with a minimal type allowlist and disable polymorphic or executable hooks.
  • Update the affected library and add inert tests for unknown types, extra fields, malformed nesting, and unsigned data.

Authoritative sources

Complete CVE record and remediation plan

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