{"id":"CVE-2026-45498","aliases":["EUVD-2026-31102","GHSA-8gp3-pghr-6wxp"],"status":"published","title":"Microsoft Defender Denial of Service Vulnerability","description":"Microsoft Defender Denial of Service Vulnerability","severity":{"version":"3.1","score":4,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.63076,"percentile":0.99213,"model":"v2026.06.15"},"facts":{"in_kev":true,"known_exploited":true,"public_exploit":true,"fix_available":false},"cwes":["CWE-400"],"published":"2026-05-20T13:09:12Z","modified":"2026-08-10T15:13:18Z","kev":{"date_added":"2026-05-20","due_date":"2026-06-03","required_action":"Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.","known_ransomware_use":"Unknown"},"exploitation":[{"source":"euvd","since":"2026-05-20"},{"source":"kev","since":"2026-05-20"}],"exploits":[{"source":"pocgithub","id":"salihuahmad105-creator/Vulnerability-scanner","title":"salihuahmad105-creator/Vulnerability-scanner","date":"2026-07-02","url":"https://github.com/salihuahmad105-creator/Vulnerability-scanner"}],"products":[{"vendor":"microsoft","product":"defender"},{"vendor":"microsoft","product":"defender_antimalware_platform"},{"vendor":"microsoft","product":"microsoft defender antimalware platform"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45498","tags":["vendor-advisory","patch","Vendor Advisory"]},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-45498","tags":["government-resource","Third Party Advisory","US Government Resource"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-45498"},{"url":"https://github.com/advisories/GHSA-8gp3-pghr-6wxp"}],"sources":{"cve":[{"id":"CVE-2026-45498","title":"Microsoft Defender Denial of Service Vulnerability","description":"Microsoft Defender Denial of Service Vulnerability","status":"published","published":"2026-05-20T13:09:12.903Z","modified":"2026-08-10T15:13:18.09Z","cvss":[{"version":"3.1","score":4,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C","level":"medium","assessor":"cna"}],"cwes":["CWE-400"],"updated_at":"2026-11-02T13:46:43.922571Z"}],"euvd":[{"id":"EUVD-2026-31102","description":"Microsoft Defender Denial of Service Vulnerability","status":"published","published":"2026-05-20T13:09:12Z","modified":"2026-08-10T15:13:18Z","cvss":[{"version":"3.1","score":4,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C","level":"medium"}],"exploited_since":"2026-05-20","updated_at":"2026-11-02T18:02:02.39155Z"}],"ghsa":[{"id":"GHSA-8gp3-pghr-6wxp","title":"Microsoft Defender Denial of Service Vulnerability","description":"Microsoft Defender Denial of Service Vulnerability","status":"published","published":"2026-05-20T15:35:32Z","modified":"2026-05-20T18:31:35Z","cvss":[{"version":"3.1","score":4,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium"}],"cwes":["CWE-400"],"updated_at":"2026-11-02T15:08:13.87243Z"}],"kev":[{"id":"CVE-2026-45498","title":"Microsoft Defender Denial of Service Vulnerability","description":"Microsoft Defender contains an unspecified vulnerability that allows for denial of service.","kev":{"date_added":"2026-05-20","due_date":"2026-06-03","required_action":"Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.","known_ransomware_use":"Unknown"},"updated_at":"2026-11-02T17:00:15.999436Z"}],"nvd":[{"id":"CVE-2026-45498","description":"Microsoft Defender Denial of Service Vulnerability","status":"published","published":"2026-05-20T13:16:36.78Z","modified":"2026-07-23T12:10:00.11Z","cvss":[{"version":"3.1","score":4,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium","assessor":"secondary"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary"}],"cwes":["CWE-400"],"updated_at":"2026-11-02T14:12:19.752984Z"}]}}