Microsoft Corporation (NASDAQ:MSFT) has issued an urgent security alert after uncovering active cyberattacks targeting SharePoint server software widely used by U.S. government agencies and businesses for internal document sharing.
What Happened: On Saturday, Microsoft disclosed that previously unknown vulnerabilities in on-premises SharePoint servers are being exploited in a "zero-day" attack, reported Reuters.
The company confirmed that SharePoint Online in Microsoft 365 is not affected. "We’ve been coordinating closely with CISA, DOD Cyber Defense Command, and key cybersecurity partners globally throughout our response," a Microsoft spokesperson said.
The company warned that the vulnerability allows an authorized attacker to conduct spoofing over a network, masquerading as a trusted source to manipulate data or access sensitive information.
The Washington Post first reported the attacks, noting that unidentified actors exploited the flaw in recent days to target U.S. and international agencies. Tens of thousands of servers may be at risk, according to cybersecurity experts cited in the report.
The FBI confirmed it is aware of the attacks and is working closely with federal and private-sector partners to assess the threat. However, it did not disclose further details.
Microsoft did not immediately respond to Benzinga's request for comments.
Why It's Important: On Friday, Microsoft announced it would no longer involve engineers based in China in supporting its cloud-computing projects for the U.S. Defense Department.
The decision follows a ProPublica investigation that brought the practice to light, leading Defense Secretary Pete Hegseth to initiate a review of the Pentagon's cloud contracts.
Price Action: Microsoft shares have climbed 21.85% year-to-date and gained 15.15% over the past 12 months. On Friday, the stock dipped 0.32% during regular trading, according to Benzinga Pro data.
Benzinga’s Edge Stock Rankings indicate that MSFT continues to show strong upward momentum across short, medium and long-term timeframes. However, despite its solid momentum score, the stock’s value rating remains comparatively lower. Further performance insights can be found here.
Read Next:
Disclaimer: This content was partially produced with the help of AI tools and was reviewed and published by Benzinga editors.
Image via Shutterstock
© 2026 Benzinga.com. Benzinga does not provide investment advice. All rights reserved.
