Source (from the posted article):

During a House hearing into the cyberattack in April, UnitedHealth’s CEO Witty confirmed that the cybercriminals broke into one of its employee systems using stolen credentials that were not protected with multi-factor authentication (MFA), a security feature that can help to protect against the misuse of password theft.

The Wizard of Oz (1939) https://www.youtube.com/watch?v=zJ6VT7ciR1o

When A Stranger Calls (1979)
https://www.youtube.com/watch?v=rkcGm-pWwsQ

Or slightly more recently:
When A Stranger Calls (2006)
https://www.youtube.com/watch?v=Mf2jBo3_T3k

Source: Homestar Runner - Strong Bad Email #50 - 50 Emails
https://homestarrunner.com/sbemails/50-50-emails
https://www.youtube.com/watch?v=7rrZ-sA4FQc

Source: xkcd - “Dependency” - https://xkcd.com/2347/