CVE-2026-69355 Microsoft Exchange Server Remote Code Execution Vulnerability

{
  "id": "2bd01231f78b3ccb405804acd355687ace849155a53c90f40fef7a3f49853fa6",
  "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69355",
  "method": "llm",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2026-69355 Microsoft Exchange Server Remote Code Execution Vulnerability",
    "summary": "External control of a file name or path in Microsoft Exchange Server could allow an authorized attacker to execute code over a network.",
    "evidence": "External control of file name or path in Microsoft Exchange Server allows an authorized attacker to execute code over a network.",
    "products": [
      {
        "name": {
          "value": "Microsoft Exchange Server",
          "evidence": "External control of file name or path in Microsoft Exchange Server allows an authorized attacker to execute code over a network."
        },
        "prerequisites": [
          {
            "value": "an authorized attacker",
            "evidence": "allows an authorized attacker to execute code over a network"
          }
        ],
        "fixed_versions": [],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "fixed_cves": [],
    "related_cves": [
      {
        "value": "CVE-2026-69355",
        "evidence": "CVE-2026-69355 Microsoft Exchange Server Remote Code Execution Vulnerability"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "official-microsoft-security-updates",
  "document_id": 26619,
  "published_at": "2026-09-08T14:00:00+00:00"
}