Microsoft warns patched systems remain vulnerable as attackers find new ways to infiltrate SharePoint servers. Microsoft has issued a critical warning about Chinese state-backed hackers exploiting security flaws in its SharePoint software. These vulnerabilities have been used to compromise a growing list of government agencies and private organizations worldwide, including the US National Nuclear Security Administration (NNSA). In a detailed blog post, Microsoft identified three hacking groups with ties to China. The groups, known as Linen Typhoon, Violet Typhoon, and Storm-2603, are believed to have taken advantage of SharePoint weaknesses that mainly affect customers who operate the software on their...