{"id":"CVE-2026-56165","aliases":["EUVD-2026-48452","GHSA-w7fc-p5p7-c9pf"],"status":"published","title":"Microsoft Account Remote Code Execution Vulnerability","description":"Heap-based buffer overflow in Microsoft Account allows an unauthorized attacker to execute code over a network.","severity":{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","level":"critical","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00974,"percentile":0.62357,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-122"],"published":"2026-07-23T23:55:12Z","modified":"2026-11-01T17:32:05Z","products":[{"vendor":"microsoft","product":"account"},{"vendor":"microsoft","product":"microsoft account"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-56165","tags":["vendor-advisory","patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-56165"},{"url":"https://github.com/advisories/GHSA-w7fc-p5p7-c9pf"}],"sources":{"cve":[{"id":"CVE-2026-56165","title":"Microsoft Account Remote Code Execution Vulnerability","description":"Heap-based buffer overflow in Microsoft Account allows an unauthorized attacker to execute code over a network.","status":"published","published":"2026-07-23T23:55:12.338Z","modified":"2026-11-01T17:32:05.139Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","level":"critical","assessor":"cna"}],"cwes":["CWE-122"],"updated_at":"2026-11-02T13:37:02.780526Z"}],"euvd":[{"id":"EUVD-2026-48452","description":"Heap-based buffer overflow in Microsoft Account allows an unauthorized attacker to execute code over a network.","status":"published","published":"2026-07-23T23:55:12Z","modified":"2026-11-01T17:32:05Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","level":"critical"}],"updated_at":"2026-11-02T16:58:49.629727Z"}],"ghsa":[{"id":"GHSA-w7fc-p5p7-c9pf","title":"Heap-based buffer overflow in Microsoft Account allows an unauthorized attacker to execute code...","description":"Heap-based buffer overflow in Microsoft Account allows an unauthorized attacker to execute code over a network.","status":"published","published":"2026-07-24T03:31:55Z","modified":"2026-07-24T03:31:56Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-122"],"updated_at":"2026-11-02T15:09:45.375488Z"}],"nvd":[{"id":"CVE-2026-56165","description":"Heap-based buffer overflow in Microsoft Account allows an unauthorized attacker to execute code over a network.","status":"published","published":"2026-07-24T01:17:34.75Z","modified":"2026-10-24T13:10:00.147Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"secondary"}],"cwes":["CWE-122"],"updated_at":"2026-11-02T14:12:32.473901Z"}]}}