CVE-2026-69356 Microsoft Exchange Server Spoofing Vulnerability

{
  "id": "71384c55de8222c7996f1e2457d9d320b28470db31c2a80a9cb072a289a1f922",
  "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69356",
  "method": "llm",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2026-69356 Microsoft Exchange Server Spoofing Vulnerability",
    "summary": "Improper input neutralization during web page generation in Microsoft Exchange Server may allow an unauthorized attacker to perform spoofing over a network.",
    "evidence": "Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Exchange Server allows an unauthorized attacker to perform spoofing over a network.",
    "products": [
      {
        "name": {
          "value": "Microsoft Exchange Server",
          "evidence": "CVE-2026-69356 Microsoft Exchange Server Spoofing Vulnerability"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "fixed_cves": [],
    "related_cves": [
      {
        "value": "CVE-2026-69356",
        "evidence": "CVE-2026-69356 Microsoft Exchange Server Spoofing Vulnerability"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "official-microsoft-security-updates",
  "document_id": 26620,
  "published_at": "2026-09-08T14:00:00+00:00"
}