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EP. 142: How CVE-2026-12569 Turned Windchill Into a Ransomware Gateway
Summary
CVE-2026-12569 is a critical unauthenticated remote code execution vulnerability affecting PTC Windchill PDMLink and FlexPLM. The flaw involves deserialization of untrusted data and carries a CVSS 4.0 score of 9.3 and a CVSS 3.1 score of 9.8.
The vulnerability has been exploited to deploy persistent JSP web shells, and recent reporting associates some activity with a Cl0p ransomware affiliate. PTC has released patches, indicators of compromise, detection guidance, and repeated urgent remediation notices.
Organizations should patch immediately, reduce internet exposure, inspect login…
The skinny
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