We rarely get to learn about sources and methods but here is a recent case where cameras in buildings were hacked. https://nos.nl/nieuwsuur/artikel/2213767-dut

We rarely get to learn about sources and methods but here is a recent case where cameras in buildings were hacked. https://nos.nl/nieuwsuur/artikel/2213767-dutch-intelligence-first-to-alert-u-s-about-russian-hack-of-democratic-party.html https://nos.nl/nieuwsuur/artikel/2213767-dutch-intelligence-...