{"id":"CVE-2026-55005","title":"Heap-based buffer overflow in Microsoft Exchange Server allows an authorized attacker to execute code over a network.","summary":"Heap-based buffer overflow in Microsoft Exchange Server allows an authorized attacker to execute code over a network.","severity":"high","cvss":8.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cwe":["CWE-122"],"vendor":"microsoft","product":"exchange_server","affected":["exchange_server = 2016","exchange_server = 2019","exchange_server_subscription_edition < 15.02.2562.045"],"patched":["exchange_server_subscription_edition 15.02.2562.045"],"published":"2026-07-14","updated":"2026-10-14","sourceUpdated":"2026-10-14T22:10:00.210","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-55005","references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-55005","label":"secure@microsoft.com"}],"tags":["nvd","cve.org"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-07-15T03:57:28.509400Z"},"epss":0.0101,"epssPercentile":0.62967,"ingestedAt":"2026-09-08T17:06:31.929Z","slug":"CVE-2026-55005","body":"## Overview\n\nHeap-based buffer overflow in Microsoft Exchange Server allows an authorized attacker to execute code over a network.\n\n## Affected\n\n- `exchange_server = 2016`\n- `exchange_server = 2019`\n- `exchange_server_subscription_edition < 15.02.2562.045`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `exchange_server_subscription_edition 15.02.2562.045`","depth":"twilight","depthScore":49,"depthScoreParts":{"impact":48.4,"likelihood":0.2,"exploitation":0,"ransomware":0},"changes":[]}