https://tusharvartak.com Executive cyber intelligence briefings on cyber risk, AI threats, infrastructure exposure, and board-level decision-making. en-us Sat, 18 Apr 2026 06:00:00 +0000 https://tusharvartak.com/assets/og/default.png https://tusharvartak.com https://tusharvartak.com/posts/2026-04-18.html https://tusharvartak.com/posts/2026-04-18.html Sat, 18 Apr 2026 06:00:00 +0000 Tushar Vartak A board-level analysis of active SharePoint exploitation, executive-targeted social engineering, and why attackers increasingly treat leadership itself as privileged infrastructure.