CVE-2021-27396: Siemens Tecnomatix Plant Simulation

High severity, CVSS 7.8. EPSS: 1.5% chance of exploitation in the next 30 days.

A vulnerability has been identified in Tecnomatix Plant Simulation (All versions < V16.0.5). The PlantSimCore.dll library lacks proper validation of user-supplied data when parsing SPP files. This could result in a stack based buffer overflow, a different vulnerability than CVE-2021-27398. An attacker could leverage this vulnerability to execute code in the context of the current process. (ZDI-CAN-13279)

Affected products

• Siemens Tecnomatix Plant Simulation: before 16.0.5 (fixed in 16.0.5)

Published 2021-05-12. Last modified 2026-06-17.