The author almost got hacked on TeamViewer. He had forgotten that the app was installed on multiple systems. The attacker was going from one compromised machine to the next to identify who the victim was and what the timezone was. Do not reuse passwords between applications. Use strong and hard-to-guess passwords. Use a single sign-on (SSO) tool with two-factor authentication to manage them. If a product is not authorized within your corporate environment, discontinue use and uninstall.”]
Source: https://securityintelligence.com/compromised-before-my-very-eyes-how-i-almost-got-hacked/