CVE-2021-27494

Name: CVE-2021-27494
Creator: NVD / NIST
Published: 2021-05-27T16:15:08.097+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10EPSS 2.20%

Last modified Jun 17, 2026

CVE-2021-27494 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. Datakit Software libraries CatiaV5_3dRead, CatiaV6_3dRead, Step3dRead, Ug3dReadPsr, Jt3dReadPsr modules in KeyShot Versions v10.1 and prior lack proper validation of user-supplied data when parsing STP files. This could result in a stack-based buffer overflow. EPSS estimates a 2.20% chance of exploitation in the next 30 days.

Description

Datakit Software libraries CatiaV5_3dRead, CatiaV6_3dRead, Step3dRead, Ug3dReadPsr, Jt3dReadPsr modules in KeyShot Versions v10.1 and prior lack proper validation of user-supplied data when parsing STP files. This could result in a stack-based buffer overflow. An attacker could leverage this vulnerability to execute code in the context of the current process.

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

2.20%

80.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-121

Affected Software

Vendor	Product	Versions
Datakit	Crosscadware	<= 2021.1
Luxion	Keyshot	<= 10.1
Siemens	Solid Edge Se2020 Firmware	All versions
Siemens	Solid Edge Se2021 Firmware	All versions

References

https://cert-portal.siemens.com/productcert/pdf/ssa-119468.pdfThird Party Advisory
https://us-cert.cisa.gov/ics/advisories/icsa-21-145-01Third Party Advisory, US Government Resource
https://www.zerodayinitiative.com/advisories/ZDI-21-564/Third Party Advisory, VDB Entry
https://cert-portal.siemens.com/productcert/pdf/ssa-119468.pdfThird Party Advisory
https://us-cert.cisa.gov/ics/advisories/icsa-21-145-01Third Party Advisory, US Government Resource
https://www.zerodayinitiative.com/advisories/ZDI-21-564/Third Party Advisory, VDB Entry

Timeline

Published: May 27, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-27494?

How severe is CVE-2021-27494?

CVE-2021-27494 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 2.20% probability of exploitation in the next 30 days.

How do I fix CVE-2021-27494?

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-2021-27494?

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

Scan your code now

Source: NVD / NIST