Microsoft warns of SharePoint server cyberattack

Microsoft warns of SharePoint server cyberattack

Post by : Monika

Photo: Reuters

Recently, Microsoft issued an important warning to businesses and governments worldwide. The company said a serious cyberattack is happening right now. This attack targets a popular software called SharePoint, which many companies and government offices use to manage and share their files securely.

What Happened?
Microsoft discovered that hackers are attacking a weakness, called a "zero-day vulnerability," in SharePoint servers. A zero-day vulnerability means that the problem in the software was unknown before, so no fix was available at first. Hackers are now using this problem to break into servers, steal information, or cause damage.

This is very serious because SharePoint is used by many organizations to store important documents and data. If hackers get inside, they could access private information or even control the servers.

Who Is at Risk?
The attack is focused on SharePoint servers that are installed and run inside a company or government office, called "on-premises" servers. This means the servers are physically located at the organization, not in the cloud or on the internet.

Many big businesses, government departments, schools, and other institutions use SharePoint to help workers share files and collaborate. Because these servers hold valuable data, they are a prime target for hackers.

What Is Microsoft Doing?
As soon as Microsoft found out about this attack, they worked quickly to create a fix, called a "security patch." This patch is designed to close the weakness in the software so hackers cannot use it anymore.

Microsoft is asking all SharePoint users to install this patch immediately. They say it is very important to do this quickly to protect servers from being attacked.

If organizations cannot apply the patch right away, Microsoft recommends disconnecting the SharePoint servers from the internet and other networks. This step helps prevent hackers from reaching the vulnerable servers.

Why Is This Attack Dangerous?
Zero-day attacks are dangerous because no one knows about the problem until it is used by hackers. This means organizations do not have time to prepare before the attack starts.

Hackers can use the vulnerability to gain access without permission, steal sensitive data, or spread malware that harms the system.

If attackers get into the servers, they could take control, lock users out, or use the servers to attack other computers.

How Can Organizations Protect Themselves?

  • Microsoft advises companies and governments to:
  • Install the security patch immediately: This is the best way to close the weakness.
  • Disconnect servers if patching is delayed: This stops hackers from reaching vulnerable servers.
  • Monitor their networks: Watch for unusual activity that might show an attack is happening.
  • Use strong passwords and multi-factor authentication: To make it harder for hackers to break in.
  • Keep all software up to date: Regular updates help protect against many kinds of attacks.

What Should Regular People Know?
If you work in an organization that uses SharePoint servers, it is important to tell your IT department about this warning. They need to act fast to keep the company’s data safe.

For most regular users who only access SharePoint through the internet or cloud services, this attack does not affect you directly. The problem is with servers installed on site.

The Bigger Picture
This attack shows how important cybersecurity is today. As more companies rely on software like SharePoint to store and share data, protecting these systems from hackers is critical.

Governments and companies worldwide spend a lot of money and effort on cybersecurity. But hackers are always looking for new ways to break in, so everyone must stay alert.

Microsoft’s quick response to this problem helped reduce the risk, but it is up to every organization to follow the advice and protect their systems.

A new cyberattack is threatening Microsoft SharePoint servers used by many businesses and governments. It exploits a previously unknown weakness, making it a "zero-day" attack.

Microsoft has released a patch to fix the problem and urges all users to install it immediately. If they cannot, disconnecting the servers is the next best step.

Organizations must act fast to avoid data theft or damage. This event reminds us how important it is to keep software updated and stay vigilant against cyber threats.

July 21, 2025 12:12 p.m. 875

SharePoint server

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