CVE-2021-27398

Name: CVE-2021-27398
Creator: NVD / NIST
Published: 2021-05-12T14:15:11.897+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10EPSS 1.45%

Last modified Jun 17, 2026

CVE-2021-27398 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. 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. EPSS estimates a 1.45% chance of exploitation in the next 30 days.

Description

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-2021-27396. An attacker could leverage this vulnerability to execute code in the context of the current process. (ZDI-CAN-13290)

Metrics

CVSS 3.1

7.8/10

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS Probability

1.45%

70.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-121

Affected Software

Vendor	Product	Versions
Siemens	Tecnomatix Plant Simulation	< 16.0.5

References

https://cert-portal.siemens.com/productcert/pdf/ssa-983548.pdfVendor Advisory
https://www.zerodayinitiative.com/advisories/ZDI-21-570/Third Party Advisory, VDB Entry
https://cert-portal.siemens.com/productcert/pdf/ssa-983548.pdfVendor Advisory
https://www.zerodayinitiative.com/advisories/ZDI-21-570/Third Party Advisory, VDB Entry

Timeline

Published: May 12, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-27398?

How severe is CVE-2021-27398?

CVE-2021-27398 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 1.45% probability of exploitation in the next 30 days.

How do I fix CVE-2021-27398?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-27398?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST