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

Is it exploited?

Yes. CISA added it to the Known Exploited Vulnerabilities catalog on 25 Jun 2026, 7 days after the CVE record was published.

How likely is exploitation in the next 30 days?

46%

EPSS score, percentile 98.8 of all scored records

How severe?

9.3 Critical

CVSS v4.0 base score, given by the CNA

What should I do?

CISA deadline 28 Jun 2026. Apply mitigations in accordance with vendor instructions … Full text

Advisories and patches (1)

Which versions are affected?

Affected

• 11.0 M030 and earlier
• 11.1 M020
• 11.2.1.0
• 12.0.2.0
• 12.1.2.0
• 13.0.2.0

and 13 more in the table below

Versions by product

Source: CISA Known Exploited Vulnerabilities (KEV) catalog, 2026.10.28, as of 28 Oct 2026; FIRST Exploit Prediction Scoring System (EPSS), v2026.06.15, as of 28 Oct 2026; CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.

What to do

CISA due date for this action: 28 June 2026.

Advisories and patches

• ptc.com (Vendor advisory, Mitigation)

Linked from CISA's catalog entry

• https://www.ptc.com/en/support/article/CS473270
• https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk
• https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk
• https://nvd.nist.gov/vuln/detail/CVE-2026-12569

Affected products and versions

As listed in the CVE record.

Versions not listed are: unaffected.

Versions not listed are: unaffected.

Source: CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.

About this 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.

Summary: CISA's KEV catalog, as of 28 Oct 2026.

• CISA added CVE-2026-12569 to its Known Exploited Vulnerabilities (KEV) catalog on 25 Jun 2026.
• CISA marks it as known to be used in ransomware campaigns.
• The due date CISA sets for the required action is 28 Jun 2026.
• The CVE record was published on 18 Jun 2026, 7 days before it was added to KEV.
• The CVE record carries a CVSS v4.0 base score of 9.3 (Critical), given by its CNA.
• FIRST's EPSS model puts the probability of exploitation in the next 30 days at 46% (percentile 98.8), as of 28 Oct 2026.
• CISA's SSVC assessment in the CVE record: exploitation active, automatable yes, technical impact total.

Source: CISA Known Exploited Vulnerabilities (KEV) catalog, 2026.10.28, as of 28 Oct 2026; CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026; FIRST Exploit Prediction Scoring System (EPSS), v2026.06.15, as of 28 Oct 2026. About the data.

Description

Remote Code Execution (RCE) vulnerability in Windchill PDMlink

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

Source: CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.

Weakness

• CWE-20: Improper input validation
• CWE-502: Deserialization of untrusted data

Attack patterns (CAPEC)

• CAPEC-586: Object Injection
• CAPEC-153: Input Data Manipulation

CWE and CAPEC are maintained by MITRE; the entries are those named in the CVE record and the KEV entry.

Timeline