Vulnerabilities reside in the way Canon implements Picture Transfer Protocol (PTP) in its firmware, a standard protocol that modern DSLR cameras use to transfer files between camera and computer or mobile devices via wired (USB) or wirelessly (WiFi) Security researchers at cybersecurity firm CheckPoint demonstrated how easy it is for hackers to remotely infect a digital DSLR camera with ransomware and hold private photos and videos hostage until victims pay a ransom. Canon EOS-series digital SLR and mirrorless cameras, PowerShot SX740 HS, Power shot SX70 HS and PowerShot G5X Mark II are among those affected.
Source: https://thehackernews.com/2019/08/dslr-camera-hacking.html