China-linked groups exploit triple zero-day chain; Proofpoint warns of widening activity

Multiple China-aligned threat actors are actively exploiting a chain of three zero-day vulnerabilities, targeting various organizations. Proofpoint assesses the activity as ongoing and expects it to expand, indicating a coordinated and rapid exploitation effort. The full scope of victims and the specific vulnerabilities remain undisclosed, but the speed of exploitation suggests pre-positioned access or prior knowledge.