Hackers Exploit Microsoft SharePoint RCE Chain with Proof-of-Concept
Threat actors leveraging two vulnerabilities to achieve remote code execution on unpatched servers
Key Takeaways
- Attackers are exploiting a chain of two Microsoft SharePoint vulnerabilities to achieve RCE on unpatched servers.
- A Proof-of-Concept exploit is publicly available, confirming active exploitation.
- Microsoft has released security updates; immediate patching is recommended.
- Potential impacts include arbitrary code execution, data exfiltration, and lateral movement.
- Exact CVE identifiers require official Microsoft advisory verification.
Quick answers
- What happened?
- According to threat intelligence company Defused, attackers are actively exploiting a chain of two Microsoft SharePoint vulnerabilities to achieve Remote Code Execution (RCE) on unpatched servers. A Proof-of-Concept exploit has been published, and Microsoft has released security updates to address the flaws. The exact CVE identifiers are pending official advisory verification.
- Which products are affected?
- SharePoint
- What should defenders do?
- Apply Microsoft security updates immediately. Administrators should ensure all SharePoint servers are running the latest patched versions. Monitor for unusual activity and review Microsoft's official security advisories for CVE details and patch guidance.
Threat intelligence company Defused reports that attackers are targeting a chain of two Microsoft SharePoint vulnerabilities that can allow arbitrary code execution on unpatched servers. The exploitation chain leverages multiple flaws to bypass security controls, with a Proof-of-Concept (PoC) exploit now publicly available. BleepingComputer coverage confirms the active exploitation trend. Microsoft has released security updates addressing the vulnerabilities, and administrators are urged to apply the latest patches immediately to reduce the risk of compromise. The report highlights the potential for full system compromise, data exfiltration, and lateral movement within affected networks. Exact CVE identifiers were not listed in the source summary and require further verification through official Microsoft advisories.
Security Details
The vulnerability chain involves two SharePoint flaws that, when combined, allow remote code execution on unpatched servers. A Proof-of-Concept exploit has been published, and active exploitation is being tracked. Specific CVE identifiers are not confirmed in the source summary and require official Microsoft advisory verification.
Affected products
SharePoint
Mitigation
Apply Microsoft security updates immediately. Administrators should ensure all SharePoint servers are running the latest patched versions. Monitor for unusual activity and review Microsoft's official security advisories for CVE details and patch guidance.
Sources
BleepingComputer
Hackers target Microsoft SharePoint RCE chain with PoC exploit
Aug 26, 2026 · 14:47
Original link
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