CVE-2021-27399

Name: CVE-2021-27399
Creator: NVD / NIST
Published: 2021-06-08T20:15:08.78+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10EPSS 1.34%

Last modified Jun 17, 2026

CVE-2021-27399 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. A vulnerability has been identified in Simcenter Femap 2020.2 (All versions < V2020.2.MP3), Simcenter Femap 2021.1 (All versions < V2021.1.MP3). The femap.exe application lacks proper validation of user-supplied data when parsing FEMAP files. EPSS estimates a 1.34% chance of exploitation in the next 30 days.

Description

A vulnerability has been identified in Simcenter Femap 2020.2 (All versions < V2020.2.MP3), Simcenter Femap 2021.1 (All versions < V2021.1.MP3). The femap.exe application lacks proper validation of user-supplied data when parsing FEMAP files. This could result in an out of bounds write past the end of an allocated structure, a different vulnerability than CVE-2021-27387. An attacker could leverage this vulnerability to execute code in the context of the current process. (ZDI-CAN-12820)

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

1.34%

67.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-787

Affected Software

Vendor	Product	Versions
Siemens	Simcenter Femap	< 2020.2
Siemens	Simcenter Femap	2020.2
Siemens	Simcenter Femap	2021.1

References

https://cert-portal.siemens.com/productcert/pdf/ssa-133038.pdfPatch, Vendor Advisory
https://www.zerodayinitiative.com/advisories/ZDI-21-781/Third Party Advisory, VDB Entry
https://cert-portal.siemens.com/productcert/pdf/ssa-133038.pdfPatch, Vendor Advisory
https://www.zerodayinitiative.com/advisories/ZDI-21-781/Third Party Advisory, VDB Entry

Timeline

Published: Jun 8, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-27399?

How severe is CVE-2021-27399?

CVE-2021-27399 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 1.34% probability of exploitation in the next 30 days.

How do I fix CVE-2021-27399?

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-2021-27399?

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

Scan your code now

Source: NVD / NIST