Piriform, makers of the popular PC cleaning software CCleaner, said that a few versions of the program's 32-bit binary were hijacked by hackers who could insert a two-stage backdoor capable of remote code execution. Investigation is on to understand what exactly caused the hijack that resulted in about 2.27 million users getting affected.
https://www.notebookcheck.net/CCleaner-hijacked-by-hackers-to-open-a-backdoor-for-remote-code-execution.249342.0.html