CVE-2023-35921

Summary

CVE-2023-35921 is a recently disclosed vulnerability affecting various Siemens SIMATIC MV series devices, including the MV540 H, MV540 S, MV550 H, MV550 S, MV560 U, and MV560 X models. These devices fail to properly process certain malicious Ethernet frames, making them susceptible to denial-of-service (DoS) attacks. The issue lies within the affected devices' handling of incoming network traffic, allowing unauthenticated remote attackers to trigger a condition that necessitates a manual restart of the devices to regain functionality. Versions prior to V3.3.4 are known to be affected.

Prevent cyber attacks with Recorded Future by prioritizing and patching critical vulnerabilities being exploited by threat actors targeting your industry. Book your demo to learn more.