1. Reusing the Same Password Everywhere
Using one password across email, banking, and shopping sites means a single breach can unlock your entire digital life. Attackers routinely “credential-stuff” leaked passwords on other sites.
2. Using Weak or Guessable Passwords
Short, simple passwords like names, birthdays, or “Password123” are trivial to crack with automated tools. Strong passwords mix length, randomness, and different character types.
3. Not Using a Password Manager
Typing and memorizing every password pushes people to reuse or simplify them. A password manager lets you generate and store long, unique passwords for each account.
4. Skipping Two-Factor Authentication (2FA)
Declining 2FA on key accounts (email, banking, social media) removes a powerful extra layer. Even if someone knows your password, 2FA can block them from logging in.
5. Relying Only on SMS Codes for 2FA
Text messages can be intercepted through SIM-swaps and phone number hijacking. App-based authenticators or hardware keys are more resilient and harder to attack.
6. Ignoring Security Alerts and Login Notifications
Many people dismiss “new login” or “suspicious activity” emails as noise. These alerts are often early warning signs that someone is testing or accessing your account.
7. Clicking Links in Unexpected Emails or Messages
Phishing emails, DMs, and texts often mimic banks, delivery services, or tech companies. One careless click on a fake login page can hand over your credentials.
8. Downloading Attachments from Unknown Senders
Malicious attachments can install spyware, ransomware, or remote access tools. Even familiar-looking names can be spoofed or compromised.
9. Saving Passwords in Plain Text Notes or Docs
Storing logins in unprotected notes, spreadsheets, or emails makes them easy to steal if a device or account is compromised. Those files are often the first thing attackers search.
10. Using Public Wi‑Fi Without Protection
Logging into email, banking, or work apps on open Wi‑Fi can expose your traffic to snooping. Attackers on the same network can intercept logins or inject malicious content.
11. Not Updating Apps, Browsers, and Operating Systems
Delaying updates leaves known security holes unpatched. Cybercriminals actively scan for devices running outdated software with public vulnerabilities.
12. Installing Sketchy Browser Extensions or Apps
Free tools promising coupons, video downloads, or “speed boosts” sometimes harvest data or inject ads. Over‑permissive extensions can read passwords, cookies, and browsing activity.
13. Oversharing Personal Details on Social Media
Posting birthdays, pet names, schools, or your mother’s maiden name gives attackers material to reset passwords or answer security questions. Public profiles are a goldmine for social engineering.
14. Using Easily Guessed Security Questions
Questions like “What is your favorite color?” or “Where did you go to school?” are often publicly known. If possible, treat answers like passwords or use nonsensical responses.
15. Not Logging Out on Shared or Public Devices
Staying signed in on a shared computer lets the next user access your email, cloud storage, or social media. Auto-login plus saved passwords can expose everything.
16. Granting Excessive Permissions to Apps and Services
“Sign in with” buttons and third‑party apps often request broad access to email, contacts, or files. Over time, forgotten connected apps become hidden risks if those services get breached.
17. Ignoring Account Recovery Settings
Outdated phone numbers and backup emails can lock you out when something goes wrong. If attackers change recovery settings first, they can keep you from regaining control.
18. Using Work Email and Passwords for Personal Sites
Reusing corporate credentials on shopping or hobby sites can expose your employer if one of those services is compromised. It also makes it easier for targeted attacks against your job.
19. Assuming “It Won’t Happen to Me”
Many people underestimate how automated and large-scale attacks are. Complacency leads to shortcuts, and shortcuts are exactly what attackers rely on to succeed.
