CVE-2026-65660 Microsoft SharePoint Server Remote Code Execution Vulnerability

{
  "id": "86121e150c78a610568e5a4f65b5ef1d5c556c851ba53511485c625aa83401a1",
  "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-65660",
  "method": "llm",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2026-65660 Microsoft SharePoint Server Remote Code Execution Vulnerability",
    "summary": "Microsoft reports reliable evidence of observed attacks exploiting this vulnerability as of 9/25/2026.",
    "evidence": "As of 9/25/2026, Microsoft had reliable evidence of observed attacks against exploitation of this vulnerability.",
    "products": [
      {
        "name": {
          "value": "Microsoft SharePoint Server",
          "evidence": "CVE-2026-65660 Microsoft SharePoint Server Remote Code Execution Vulnerability"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "fixed_cves": [],
    "related_cves": [
      {
        "value": "CVE-2026-65660",
        "evidence": "CVE-2026-65660 Microsoft SharePoint Server Remote Code Execution Vulnerability"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "official-microsoft-security-updates",
  "document_id": 26083,
  "published_at": "2026-09-25T14:00:00+00:00"
}