What 2025 Taught Us About Zero-Day Exploitation

Outpost24's review summarizes major zero-day vulnerabilities exploited in 2025 across enterprise platforms (Oracle EBS, React Server Components, SAP NetWeaver, Microsoft SharePoint, Citrix NetScaler) including timelines, observed exploitation, and implicated threat actors; it highlights four defensive lessons—enterprise software targeting, rise of financially motivated groups, lingering risk after patch release, and rapid weaponization—and provides telemetry-backed analysis of multiple high-severity incidents and associated campaigns.