{"id":"CVE-2026-56165","title":"Microsoft Account Remote Code Execution Vulnerability","summary":"Heap-based buffer overflow in Microsoft Account allows an unauthorized attacker to execute code over a network.","severity":"critical","cvss":9.8,"cvssVector":"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","cvssSource":"cna","cwe":["CWE-122"],"vendor":"Microsoft","product":"Microsoft Account","affected":["account -"],"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"total","timestamp":"2026-07-24T00:00:00+00:00"},"published":"2026-07-23","updated":"2026-09-25","sourceUpdated":"2026-09-25T18:19:43.156Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-56165","references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-56165","label":"Microsoft Account Remote Code Execution Vulnerability"}],"tags":["cve.org"],"epss":0.00974,"epssPercentile":0.60422,"ingestedAt":"2026-09-08T17:06:31.933Z","slug":"CVE-2026-56165","body":"## Overview\n\nHeap-based buffer overflow in Microsoft Account allows an unauthorized attacker to execute code over a network.\n\n## Affected\n\n- `account -`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"midnight","depthScore":54,"depthScoreParts":{"impact":53.9,"likelihood":0.2,"exploitation":0,"ransomware":0},"changes":[]}