{
  "title": "Microsoft Defender CVE-2026-45498: KEV Platform DoS Exposure",
  "summary": "CISA added Microsoft Defender CVE-2026-45498 to KEV on 2026-05-20. MSRC marks exploitation detected and gives the exact fixed Defender Antimalware Platform version 4.18.26040.7.",
  "date": "2026-05-26",
  "severity": "medium",
  "tags": [
    "microsoft-defender",
    "cisa-kev",
    "vulnerability-response",
    "windows"
  ],
  "sources_count": 3,
  "indicators": {
    "slug": "microsoft-defender-cve-2026-45498-kev",
    "since": "2026-05-26T00:00:00Z",
    "until": "2026-05-26T23:59:59Z",
    "ecosystem": "",
    "cves": [
      "CVE-2026-45498"
    ],
    "cwes": [
      "CWE-400"
    ],
    "advisoryIds": [],
    "products": [
      "Microsoft Defender Antimalware Platform"
    ],
    "packages": [],
    "versions": [],
    "affectedVersions": [
      "4.18.26030.3011 <= platform < 4.18.26040.7"
    ],
    "fixedVersions": [
      "4.18.26040.7"
    ],
    "files": [],
    "paths": [],
    "services": [],
    "domains": [],
    "urls": [],
    "ips": [],
    "hashes": [],
    "processPatterns": [],
    "networkPatterns": [],
    "telemetrySelectors": [
      "MsMpEng.exe",
      "EventID 5007",
      "EventID 5013",
      "EventID 7031",
      "EventID 7034"
    ]
  }
}