US nuclear weapons agency hacked in Microsoft SharePoint attacks

US nuclear weapons agency hacked in Microsoft SharePoint attacks Sergiu Gatlan July 23, 2025 11:14 AM 1 Unknown threat actors have breached the National Nuclear Security Administration's network in attacks exploiting a recently patched Microsoft SharePoint zero-day vulnerability chain. NNSA is a semi-autonomous U.S. government agency part of the Energy Department that maintains the country's nuclear weapons stockpile and is also tasked with responding to nuclear and radiological emergencies with...