KB973346 addresses a zero-day exploit in Microsoft Video ActiveX and has now been approved for all workstations on the campus WSUS server.
The patch was released last night via WSUS at University of Waterloo, reboot your machine to get it.
The University of Waterloo acknowledges that much of our work takes place on the traditional territory of the Neutral, Anishinaabeg and Haudenosaunee peoples. Our main campus is situated on the Haldimand Tract, the land granted to the Six Nations that includes six miles on each side of the Grand River. Our active work toward reconciliation takes place across our campuses through research, learning, teaching, and community building, and is centralized within our Indigenous Initiatives Office.