News Summary

• Security researchers at Google and Microsoft say they have evidence that hackers backed by China are exploiting a zero-day bug in Microsoft SharePoint.
• The bug, known officially as CVE-2025-53770 and discovered last weekend, allows hackers to steal sensitive private keys.
• Once exploited, an attacker can use the bug to remotely plant malware and gain access to the files and data stored within.
• The Chinese government has long rebuffed allegations that it has carried out cyberattacks, though it has not always explicitly denied its involvement.