A major security vulnerability recently affected Microsoft SharePoint on-premise servers, known as CVE-2025-53770. This flaw allowed attackers to remotely execute code and gain access to sensitive internal systems. According to CBS News, the breach impacted high-profile government agencies like the Department of Homeland Security and the Department of Health and Human Services. The issue stems from a lack of timely patching and exposed servers.
This incident has drawn renewed attention to the broader risks associated with self-managed IT infrastructure. It highlights how even well-resourced organizations can fall victim to cyber threats when critical updates are delayed. The same risks apply to small businesses that may not have dedicated IT security teams.
Why This Matters to SMBs
Small and mid-sized businesses (SMBs) may think they’re not targets, but this hack proves that any unpatched SharePoint server is a potential entry point for cyberattacks. Once inside, attackers can move laterally across systems or escalate their privileges, leading to data breaches or operational disruptions. Cybersecurity Dive highlights how these vulnerabilities are being actively exploited.
For SMBs, the financial and reputational damage from a data breach can be severe. Regulatory penalties, lost customer trust, and business interruption can all stem from a single compromised system. Taking proactive steps is no longer optional; it’s essential for survival in today’s digital economy.
How to Respond: Immediate Mitigation Steps
Microsoft has released emergency patches to close these holes. All businesses using on-premise SharePoint should apply these updates immediately. In addition, enabling AMSI integration enhances protection by allowing real-time malware inspection through tools like Microsoft Defender. Businesses with Microsoft 365 Business Premium or higher already have access to this powerful security feature.
It’s also important to conduct a comprehensive security audit. This means checking all endpoints for signs of compromise, updating other potentially vulnerable software, and reviewing access logs for unusual activity. Many SMBs may not have the internal resources to do this thoroughly, which is why partnering with an expert IT provider is key.
See also: How IT Security Strategies Help Small Businesses Stay Protected
The Bigger Picture: Why On-Premise Is Becoming a Liability
Running SharePoint on-premise requires constant monitoring and manual updates, making it harder for SMBs to stay secure. With more remote workers, these servers often need to be accessible over the internet, which increases the risk. Historically, local-only networks offered some security, but that’s no longer enough. As Microsoft’s own blog points out, attackers are evolving and specifically targeting these outdated systems.
Another challenge is the growing complexity of cybersecurity threats. Modern ransomware, phishing, and exploit kits are designed to bypass basic defenses. On-premise systems often lack the layered protections built into cloud environments, making them a more attractive target for cybercriminals.
Cloud-Based SharePoint: A Smarter Path Forward
Migrating to SharePoint Online means security updates are automatic, and Microsoft handles threat detection. You get enterprise-grade protection for a fraction of the cost. According to TechTarget, cloud solutions reduce the management burden and improve flexibility.
Cloud-based solutions also scale more easily. As your business grows, so do your storage and collaboration needs. SharePoint Online allows for quick adjustments without major infrastructure investments. Plus, features like multi-factor authentication, advanced data loss prevention, and centralized policy controls come built-in.
How Zia Networks Can Help Secure Your SharePoint
Zia Networks helps small businesses stay secure by monitoring vulnerabilities, applying patches quickly, and setting up strong defenses like Microsoft Defender. We also assist in migrating your SharePoint setup to the cloud, reducing risks and saving your team time and stress.
Our team offers continuous monitoring, incident response, and cybersecurity training tailored to SMB needs. We make sure your systems are not only up to date but also configured to resist modern threats.
Conclusion
The recent SharePoint hack is a wake-up call. Keep your systems patched, monitor for threats, and consider moving to cloud-hosted solutions. Contact Zia Networks today for a SharePoint security review and find out how we can help you stay protected.
Taking action now could prevent a major breach tomorrow.
