https://www.bleepingcomputer.com/news/security/second-steam-zero-day-impacts-over-96-million-windows-users/ > A second Steam Windows client zero-day privilege escalation vulnerability affecting over 96 million users has been publicly disclosed today by Russian researcher Vasily Kravets. > This happens after Valve disputed the significance of the previous Steam 0day disclosed by Kravets on Twitter and banned him out of their HackerOne bug bounty program.