Tech
Microsoft blames Chinese state-backed hackers for SharePoint breaches; US Nuclear Agency among those hit
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Microsoft has attributed a wave of cyberattacks targeting its on-premises SharePoint servers to Chinese nation-state actors, including well-known espionage groups Violet Typhoon and Linen Typhoon, as well as a third group, Storm-2603.
The attacks exploit two critical vulnerabilities — CVE-2025-49706, a spoofing vulnerability, and CVE-2025-49704, a remote code execution flaw — which affect only on-premises SharePoint servers. Microsoft confirmed that SharePoint Online in Microsoft 365 remains unaffected.
What we know about the threat actors
Linen…
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