What’s Vulnerable › Vulnerabilities

CVE-2021-40872

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-11-10 · updated 2026-06-17
• Weakness: CWE-843

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.

Affected products

• Softing smartLink HW-DP: through 1.10
• Softing Uatoolkit Embedded: before 1.40 — fixed in 1.40

How to fix

Upgrade to a fixed version: Softing Uatoolkit Embedded 1.40. Check the vendor advisory for mitigations.

References

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

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