Network security threats refer to any malicious activity that targets the confidentiality, integrity, or availability of a network and its components. Here are some of the main network security threats:

1. Malware: Malicious software, including viruses, worms, and Trojans, that can cause damage to computers and networks.
2. Ransomware: Malware that encrypts a user’s data and demands payment in exchange for the decryption key.
3. Phishing: Social engineering attacks that trick users into revealing sensitive information, such as login credentials or credit card numbers.
4. Man-in-the-middle attacks: Attacks that intercept and modify communication between two parties.
5. Denial-of-service (DoS) attacks: Attacks that overwhelm a network or website with traffic, making it unavailable to users.
6. SQL injection: Attacks that inject malicious code into a database through a web application.
7. Cross-site scripting (XSS): Attacks that inject malicious code into a website, allowing an attacker to steal sensitive information from users.
8. Wireless network security threats: Threats to wireless networks, including unauthorized access and eavesdropping.
9. IoT security threats: Threats to internet-connected devices, such as security cameras, smart home devices, and others.
10. Social engineering attacks: Attacks that exploit human trust and emotions to steal sensitive information.

It’s important for organizations to implement various security measures and follow best practices to protect their networks from these and other security threats.