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Vulnerability record · CVE-2021-42577 · published 11 March 2022

CVE-2021-42577: Softing datafeed opc suite null pointer dereference vulnerability

Softing · Datafeed Opc Suite

An issue was discovered in Softing OPC UA C++ SDK before 5.70. A malformed OPC/UA message abort packet makes the client crash with a NULL pointer dereference.

7.5 CVSS 3.1 High EPSS 0.96% · top 39.9% CWE-476 · NULL pointer dereference
7.5CVSS 3.1 base score, v2 5.0
0.96%EPSS exploitation probability, 30 days
NoNot in CISA KEV
3Affected product versions listed by NVD
4References
17 Jun 2026Last modified by NVD

Description

An issue was discovered in Softing OPC UA C++ SDK before 5.70. A malformed OPC/UA message abort packet makes the client crash with a NULL pointer dereference.

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

Affected products

3 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://industrial.softing.com/fileadmin/sof-files/pdf/ia/support/Security_Bulletin_CVE-2021-42577.pdf Vendor Advisory
https://softing.com Vendor Advisory
https://industrial.softing.com/fileadmin/sof-files/pdf/ia/support/Security_Bulletin_CVE-2021-42577.pdf Vendor Advisory
https://softing.com Vendor Advisory

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2021-42577), CISA KEV, FIRST EPSS (scores of 2026-10-05). This page is refreshed as NVD updates the record.