Question: what are the most common types of computer security attacks?
Answer: Phishing & Social Engineering Attacks. Phishing involves sending emails that appear to be from trusted sources. ... 
Password Attacks & Credential Reuse. ... 
Denial-of-Service Attacks. ... 
Man-in-the-Middle (MitM) ... 
SQL Injections. ... 
Zero-day Exploit. ... 
Cross-site Scripting (XSS) ... 
Drive-by-downloads.