{"id":"CVE-2026-45498","title":"Microsoft Defender Denial of Service Vulnerability","summary":"Microsoft Defender Denial of Service Vulnerability","severity":"medium","cvss":4,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","cwe":["CWE-400"],"vendor":"microsoft","product":"defender_antimalware_platform","affected":["defender_antimalware_platform < 4.18.26040.7"],"patched":["defender_antimalware_platform 4.18.26040.7"],"published":"2026-05-20","updated":"2026-07-23","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-45498","references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45498","label":"secure@microsoft.com"},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-45498","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"tags":["nvd","kev","in-the-wild","exploit-available"],"epss":0.63076,"epssPercentile":0.99193,"kev":true,"kevDateAdded":"2026-05-20","kevDueDate":"2026-06-03","kevRansomware":false,"exploited":true,"zeroDay":true,"ingestedAt":"2026-07-23T12:17:54.816Z","exploits":{"github":1,"githubRepos":["https://github.com/salihuahmad105-creator/Vulnerability-scanner"],"checkedAt":"2026-09-21T15:29:06.852Z"},"exploitAvailable":true,"slug":"CVE-2026-45498","body":"## Overview\n\nMicrosoft Defender Denial of Service Vulnerability\n\n## Affected\n\n- `defender_antimalware_platform < 4.18.26040.7`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `defender_antimalware_platform 4.18.26040.7`","depth":"midnight","depthScore":60,"depthScoreParts":{"impact":22,"likelihood":12.6,"exploitation":25,"ransomware":0},"changes":[{"seq":5239,"id":"CVE-2026-45498","ts":1788887255577,"field":"exploit_available","old":"false","new":"true"},{"seq":4122,"id":"CVE-2026-45498","ts":1788886372392,"field":"exploit_available","old":"true","new":"false"},{"seq":2895,"id":"CVE-2026-45498","ts":1788883037841,"field":"exploit_available","old":"false","new":"true"},{"seq":1924,"id":"CVE-2026-45498","ts":1788882441298,"field":"exploit_available","old":"true","new":"false"},{"seq":1013,"id":"CVE-2026-45498","ts":1788881876169,"field":"exploit_available","old":"false","new":"true"}]}