@cR0w We developed the open source vulnerability-lookup project (and also the sighting part) for providing actionable intelligence in the scope of NIS2 obligation and to share the information with all CSIRTs and SOCs efficiently.
https://www.vulnerability-lookup.org/
about the sighting aspect https://www.vulnerability-lookup.org/tools/#sightings
We have still plenty of ideas. If you see something missing, let us know.