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Microsoft server hack has now hit 400 victims, researchers say
UNITED STATES, JUL 23 – Chinese state-sponsored hackers exploit unpatched Microsoft SharePoint flaws to deploy ransomware and steal data, rapidly increasing victims to over 400, including key U.S. government agencies.
- About 400 organisations have fallen victim to a campaign exploiting unpatched Microsoft SharePoint servers, Eye Security said, highlighting widespread vulnerability and ongoing threats.
- Ronen Ahdut identified two vulnerabilities in Microsoft SharePoint servers, CVE-2025-53770 and CVE-2025-53771, exploited by Chinese threat actors, according to Cynet Security.
- Eye Security said the figure is likely an undercount, Vaisha Bernard warned `There are many more, because not all attack vectors have left artifacts that we could scan for`,
- On July 24, 2025, Microsoft confirmed that Storm-2603 is deploying Warlock ransomware via the exploit, urging immediate patch application to protect on-premises SharePoint environments.
- With a public exploit now available, automated attacks against unpatched systems are set to grow, increasing risk of widespread disruption, as CISA explained that `ToolShell provides unauthenticated access to systems` and `enables malicious actors to fully access SharePoint content… and execute code over the network`.
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Microsoft alerts about a security flaw in its SharePoint software, exploited by Chinese hackers to access sensitive data Several groups of Chinese hackers have exploited a
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Microsoft SharePoint attacks ensnare 400 victims, including federal agencies
The fallout from an attack spree targeting defects in on-premises Microsoft SharePoint servers continues to spread nearly a week after zero-day exploits were discovered, setting off alarms across the globe. More than 400 organizations have been actively compromised across four waves of attacks, according to Eye Security. Multiple government agencies, including the Departments of Energy, Homeland Security and Health and Human Services, have been …
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Total News Sources53
Leaning Left5Leaning Right5Center13Last UpdatedBias Distribution57% Center
Bias Distribution
- 57% of the sources are Center
57% Center
L 22%
C 57%
R 22%
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