Microsoft has issued urgent guidance regarding a newly discovered vulnerability in SharePoint Server — CVE-2025-53770 — that could allow attackers to execute code remotely and potentially compromise sensitive enterprise data.
🔗 Read Microsoft’s official guidance
What Is CVE-2025-53770?
This critical vulnerability affects SharePoint Server and allows authenticated attackers with site owner privileges to exploit the system through malicious web requests. If successful, an attacker could run arbitrary code on the SharePoint server under the context of the service account — a serious risk for any organization using on-premises SharePoint environments.
Why This Matters
SharePoint remains a core collaboration platform for many organizations, often integrated with sensitive business workflows, documents, and personnel data. A vulnerability of this nature—allowing remote code execution by a privileged user—poses a significant risk not only to data confidentiality but also to the integrity and availability of internal systems.
Attackers who exploit CVE-2025-53770 could use compromised SharePoint servers as entry points into broader network infrastructure, potentially leading to lateral movement, privilege escalation, and the deployment of malware or ransomware.
If you rely on SharePoint for document management, project collaboration, or intranet services, this is not a patch to delay.
Who Is Affected?
Organizations running:
- SharePoint Server 2016
- SharePoint Server 2019
- SharePoint Subscription Edition
Microsoft has released patches and workarounds. Immediate action is strongly recommended.
What You Should Do Now
- Review Microsoft’s Security Guidance
Follow the official MSRC blog for patch links and technical details. - Apply the Latest Updates
Ensure your SharePoint servers are fully patched with July 2025 security updates. - Conduct a Rapid Risk Assessment
Identify if your environment has been affected and evaluate the exposure level. - Engage a Security Partner
If you’re unsure whether your SharePoint deployment is at risk, our team can help you:- Review your environment
- Apply proper remediations
- Conduct a targeted penetration test to confirm no exploit traces
Need Help?
Topgallant Partners specializes in vulnerability management and penetration testing. Our team can help you assess, patch, and validate your SharePoint systems before attackers do.
📞 Call us: 844-9PENTEST (844-973-6837) x710
🔗 Request a Cybersecurity Analysis
image sources
- pexels-ian-panelo-4567339: Photo by Nothing Ahead
