CVE-2021-33542

Phoenix Contact Classic Automation Worx Software Suite in Version 1.87 and below is affected by a remote code execution vulnerability. Manipulated PC Worx or Config+ projects could lead to a remote code execution when unallocated memory is freed because of incompletely initialized data. The attacker needs to get access to an original bus configuration file (*.bcp) to be able to manipulate data inside. After manipulation the attacker needs to exchange the original file by the manipulated one on the application programming workstation. Availability, integrity, or confidentiality of an application programming workstation might be compromised by attacks using these vulnerabilities. Automated systems in operation which were programmed with one of the above-mentioned products are not affected.

• CWE-824
• CWE-824

• https://cert.vde.com/en-us/advisories/vde-2021-020Third Party Advisory
• https://www.zerodayinitiative.com/advisories/ZDI-21-782/Third Party Advisory, VDB Entry
• https://cert.vde.com/en-us/advisories/vde-2021-020Third Party Advisory
• https://www.zerodayinitiative.com/advisories/ZDI-21-782/Third Party Advisory, VDB Entry

Published

Jun 25, 2021

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
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• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

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