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Microsoft issues emergency fix for SharePoint vulnerability

Microsoft has issued critical updates to address a cybersecurity issue affecting SharePoint servers.

July 21, 2025 at 03:38 PM

Hackers exploit recently discovered vulnerability on Microsoft SharePoint servers

Microsoft takes urgent measures to address critical vulnerabilities in SharePoint software.

Microsoft responds to major vulnerabilities in SharePoint servers

Microsoft has announced an emergency fix to address a serious vulnerability in its SharePoint software. Hackers have exploited this flaw in both private enterprises and some U.S. government agencies, prompting Microsoft to release guidance and patches quickly. The vulnerability, known as a zero-day exploit, poses significant risks to users with on-premise SharePoint servers, which are commonly used for internal document management and collaboration. Although Microsoft has provided fixes for its newer SharePoint Server versions, an update for the older 2016 version is still in progress.

Key Takeaways

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Microsoft's emergency fix addresses a critical vulnerability in SharePoint.

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Hackers have targeted both businesses and some federal agencies.

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The exploit is referred to as a zero-day, indicating no prior knowledge of the issue.

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The vulnerability affects on-premise SharePoint servers, not cloud-based versions.

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Experts warn that organizations should disconnect affected servers from the internet immediately.

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Companies owning SharePoint servers must follow Microsoft's guidance for patching.

"It’s a significant vulnerability."

Adam Meyers from CrowdStrike highlights the serious nature of the SharePoint exploit.

"While cloud environments remain unaffected, on-prem SharePoint deployments are at immediate risk."

Michael Sikorski emphasizes the dangers faced by users of on-premise SharePoint systems.

This crisis reflects the growing cyber threats targeting organizations that rely on on-premise software. The fact that hackers have already compromised numerous SharePoint servers highlights a critical gap in security preparedness among affected entities. The call by experts for immediate action and the potential for widespread implications underscore the urgent need for improved cybersecurity measures within business and government infrastructures. This incident may lead to increased scrutiny of software security practices in similar platforms.