"Pool controllers exposed to the Internet with default passwords let threat actors tweak pool pH levels, and potentially more... Last week, GhostSec first claimed it breached 55 Berghof programmable logic controllers (PLCs) across Israel. On Sept. 10, the group claimed it had control over an unidentified hotel's pool water system. GhostSec warned in a posted message that while it has control of the pool's pH and chlorine levels, it wasn't interested in using the access to harm innocent people. The threat actors simply wanted to demonstrate the kind of damage they could do, the post added..." https://www.darkreading.com/attacks...rs-let-attackers-breach-hotel-pools-in-israel