“We have a working exploit, and it took us under a day to develop it,” one security expert told CyberScoop.

The company that discovered the flaw says "at least 80,000 companies in 158 countries are potentially at risk."

Hardcoded credentials and two other flaws could give hackers remote access to EVlink charging stations. Schneider Electric has issued firmware updates to fix the problems.

The new research follows years of warnings and a significant hack against German banks last year.