Final answer:
System access threats include intruders like hackers and insiders within an organization. Governments and militant groups also engage in cyber warfare, using hacking to disrupt systems and spread disinformation.
Step-by-step explanation:
System access threats fall into two general categories: intruders and insiders. Intruders are the unauthorized external entities such as hackers who break into systems, often using sophisticated methods to exploit vulnerabilities or using social engineering techniques to deceive individuals into clicking harmful links or divulging confidential information. On the other hand, insiders are individuals within an organization who may intentionally or unintentionally cause harm. These can be employees, contractors, or business partners who have legitimate access but misuse it to steal data, disrupt operations, or introduce vulnerabilities.
On a more global scale, governments and militant groups have started to weaponize cyberspace by hacking into their adversaries' systems. This cyber warfare can lead to theft of sensitive intelligence, disruptions in satellite communications, networks, and internet services, as well as the spread of disinformation to create chaos and instability.