Microsoft Windows 10 and Windows 11 users are at risk of a new unpatched vulnerability that was recently disclosed publicly. The vulnerability SeriousSAM allows attackers with low-level permissions to access Windows system files to perform a Pass-the-Hash (and potentially Silver Ticket) attack. There is no official patch available yet from Microsoft, but the best way to protect your environment from SeriousSAM vulnerability is to implement hardening measures. CalCom CTO Dvir Goren, CTO at CalCom, has outlined his recommendations for mitigating without causing downtime.
Source: https://thehackernews.com/2021/07/how-to-mitigate-microsoft-windows-10-11.html