### Comment:
What are some common methods used by malware to exploit system vulnerabilities?

### REPLY:
Malware commonly exploits system vulnerabilities through various methods. One technique is buffer overflow, where the malware manipulates the input data of a program to overwrite adjacent memory areas and execute arbitrary code. Another method is the use of zero-day exploits, which take advantage of previously unknown software vulnerabilities. Exploiting weak passwords, unpatched software, or insecure network protocols are also common ways for malware to gain access and compromise systems.