Those Chinese hackers breached much more than the National Guard, they also got into the National Nuclear Security Administration, the US agency charged with overseeing nuclear weapons!
US nuclear weapons agency ‘among 400 organisations breached by Chinese hackers’
Microsoft says vulnerabilities in its SharePoint servers exposed as reports point to wave of attacks
By Joanna Partridge, The Guardian - July 23, 2025
https://www.theguardian.com/technology/2025/jul/23/sharepoint-targeted-by-chinese-threat-actor-hackers-says-microsoft
Microsoft says Chinese “threat actors”, including state-sponsored hackers, have exploited security vulnerabilities in its SharePoint document-sharing servers, with research indicating that several hundred government agencies and organisations have been breached. … The majority of the victims are in the US, it found, while Bloomberg reported that the US agency charged with overseeing nuclear weapons, the National Nuclear Security Administration, was among the victims.
Microsoft said it had observed three groups – the Chinese state-backed Linen Typhoon and Violet Typhoon, and Storm-2603, which is believed to be China-based – using “newly disclosed security vulnerabilities” to target internet-facing servers hosting the platform. ….