CVE-2021-40872

Name: CVE-2021-40872
Creator: NVD / NIST
Published: 2021-11-10T23:15:08.3+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 1.46%

Last modified Jun 17, 2026

CVE-2021-40872 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. An issue was discovered in Softing Industrial Automation uaToolkit Embedded before 1.40. Remote attackers to cause a denial of service (DoS) or login as an anonymous user (bypassing security checks) by sending crafted messages to a OPC/UA server. EPSS estimates a 1.46% chance of exploitation in the next 30 days.

Description

An issue was discovered in Softing Industrial Automation uaToolkit Embedded before 1.40. Remote attackers to cause a denial of service (DoS) or login as an anonymous user (bypassing security checks) by sending crafted messages to a OPC/UA server. The server process may crash unexpectedly because of an invalid type cast, and must be restarted.

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

1.46%

70.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-843

Affected Software

Vendor	Product	Versions
Softing	Smartlink Hw-Dp	<= 1.10
Softing	Uatoolkit Embedded	< 1.40

References

https://industrial.softing.com/Vendor Advisory
https://industrial.softing.com/fileadmin/sof-files/pdf/ia/support/Security_Bulletin_CVE-2021-40872.pdfVendor Advisory
https://industrial.softing.com/Vendor Advisory
https://industrial.softing.com/fileadmin/sof-files/pdf/ia/support/Security_Bulletin_CVE-2021-40872.pdfVendor Advisory

Timeline

Published: Nov 10, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-40872?

How severe is CVE-2021-40872?

CVE-2021-40872 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.46% probability of exploitation in the next 30 days.

How do I fix CVE-2021-40872?

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-2021-40872?

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

Scan your code now

Source: NVD / NIST