I can stretch the definition of zero day to make a point. Zero day is a surprise exploit that gets used before it is discovered. WinRAR has not fixed this explo

I can stretch the definition of zero day to make a point. Zero day is a surprise exploit that gets used before it is discovered. WinRAR has not fixed this exploit, and since it's proprietary software we don't even know if the company is even aware or even cares. It's also alike a zero day in the other sense that protections against the exploit haven't been developed. While in a real zero day that's because not enough time has passed for volunteers to develop protections, the case here is proprietary software can't be modified by volunteers.