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CVE-2026-4681

critical

Description

A critical remote code execution (RCE) vulnerability has been reported in PTC Windchill and PTC FlexPLM. The vulnerability may be exploited through the deserialization of untrusted data. This issue affects Windchill PDMLink: 11.0 M030, 11.1 M020, 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; FlexPLM: 11.0 M030, 11.1 M020, 11.2.1.0, 12.0.0.0, 12.0.2.0, 12.0.3.0, 12.1.2.0, 12.1.3.0, 13.0.2.0, 13.0.3.0.

References

https://www.ptc.com/en/about/trust-center/advisory-center/active-advisories/windchill-flexplm-critical-vulnerability?srsltid=AfmBOop3e7Nthx5-BsrjKdpZi50wL6l6Bt21Fz0gUub2cIPgdPGV5bNl

https://www.securityweek.com/cisa-flags-critical-ptc-vulnerability-that-had-german-police-mobilized/

https://securityaffairs.com/190049/security/cisa-and-bsi-warn-orgs-of-critical-ptc-windchill-and-flexplm-flaw.html

https://www.cisa.gov/news-events/ics-advisories/icsa-26-085-03

https://www.databreachtoday.com/german-police-rouse-system-admins-from-sleep-over-flaw-a-31179

https://www.bleepingcomputer.com/news/security/ptc-warns-of-imminent-threat-from-critical-windchill-flexplm-rce-bug/

Details

Source: Mitre, NVD

Published: 2026-03-23

Updated: 2026-03-24

Risk Information

CVSS v2

Base Score: 7.5

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P

Severity: High

CVSS v3

Base Score: 9.8

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Severity: Critical

CVSS v4

Base Score: 9.3

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L

Severity: Critical

EPSS

EPSS: 0.00378

Vulnerability Watch

Tenable Research has classified this CVE under the following Vulnerability Watch classification, which includes active and historical (inactive) classifications. You can learn more about these classifications on our blog.

Vulnerability Being Monitored