Malware is a significant threat to VSAT systems, as it can infect satellite communication devices and compromise sensitive data. Common types of malware include viruses, worms, and Trojans, which can be delivered through email, infected files, or malicious links. To protect VSAT networks, operators must deploy antivirus software, secure communication protocols, and perform regular system updates to patch vulnerabilities. Ensuring endpoint security is also crucial for preventing malware from spreading through the network.