With a single breach, those scenes — and glimpses from more than 149,000 security cameras — were suddenly revealed to hackers, who had used high-level log-in credentials to access and plunder Verkada’s vast camera network.

A hacker shared some of the materials with The Washington Post to spotlight the security threat of widespread surveillance technologies that subject the public to near-constant watch.

The cache includes real-world images and videos as well as the company’s voluminous client list, which names more than 24,000 organizations across a vast cross-section of American life, including schools, offices, gyms, banks, health clinics and county jails.