Scans for Port 8530/8531 (TCP). Likely related to WSUS Vulnerability CVE-2025-59287, (Sun, Nov 2nd)

Sensors reporting firewall logs detected a significant increase in scans for port 8530/TCP and 8531/TCP over the course of last week. Some of these reports originate from Shadowserver, and likely other researchers, but there are also some that do not correspond to known research-related IP addresses.
http://news.poseidon-us.com/TP20lQ