“A remote code execution vulnerability exists when the Windows TCP/IP stack improperly handles ICMPv6 Router Advertisement packets.”
This vulnerability affects Windows 10, Server 2019 and Server Core versions (see full Security Advisory for proper details). It can be mitigated by disabling a network feature or blocking ICMPv6 Router Advertisement packets.
Basefarm and Microsoft recommends that you install the updates for this vulnerability as soon as possible even if you plan to leave a workaround in place.
CVSS Base score is 9.8
Basefarm is currently evaluating this vulnerability, how to best handle it and ensure operational stability for all our customers. We are tracking this internally as BF-VLN-2139859 with the highest priority.