{"id":"CVE-2026-45584","aliases":["EUVD-2026-31105","GHSA-f7rp-9ghh-f4gm"],"status":"published","title":"Microsoft Defender Remote Code Execution Vulnerability","description":"Heap-based buffer overflow in Microsoft Defender allows an unauthorized attacker to execute code over a network.","severity":{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00852,"percentile":0.58683,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":false},"cwes":["CWE-122"],"published":"2026-05-20T13:09:44Z","modified":"2026-08-10T15:13:48Z","exploits":[{"source":"pocgithub","id":"96613686/CVE-2026-45584","title":"96613686/CVE-2026-45584","date":"2026-05-22","url":"https://github.com/96613686/CVE-2026-45584"}],"products":[{"vendor":"microsoft","product":"malware_protection_engine"},{"vendor":"microsoft","product":"microsoft malware protection engine"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45584","tags":["vendor-advisory","patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-45584"},{"url":"https://github.com/advisories/GHSA-f7rp-9ghh-f4gm"}],"sources":{"cve":[{"id":"CVE-2026-45584","title":"Microsoft Defender Remote Code Execution Vulnerability","description":"Heap-based buffer overflow in Microsoft Defender allows an unauthorized attacker to execute code over a network.","status":"published","published":"2026-05-20T13:09:44.329Z","modified":"2026-08-10T15:13:48.329Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","level":"high","assessor":"cna"}],"cwes":["CWE-122"],"updated_at":"2026-11-02T13:46:43.922571Z"}],"euvd":[{"id":"EUVD-2026-31105","description":"Heap-based buffer overflow in Microsoft Defender allows an unauthorized attacker to execute code over a network.","status":"published","published":"2026-05-20T13:09:44Z","modified":"2026-08-10T15:13:48Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","level":"high"}],"updated_at":"2026-11-02T18:02:01.941928Z"}],"ghsa":[{"id":"GHSA-f7rp-9ghh-f4gm","title":"Heap-based buffer overflow in Microsoft Defender allows an unauthorized attacker to execute code...","description":"Heap-based buffer overflow in Microsoft Defender allows an unauthorized attacker to execute code over a network.","status":"published","published":"2026-05-20T15:35:33Z","modified":"2026-05-20T15:35:34Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-122"],"updated_at":"2026-11-02T15:08:13.87243Z"}],"nvd":[{"id":"CVE-2026-45584","description":"Heap-based buffer overflow in Microsoft Defender allows an unauthorized attacker to execute code over a network.","status":"published","published":"2026-05-20T13:16:37.333Z","modified":"2026-07-23T12:10:00.11Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-122"],"updated_at":"2026-11-02T14:12:19.752984Z"}]}}