{"id":"CVE-2026-62913","title":"Microsoft Exchange Server Remote Code Execution Vulnerability","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/E:U/RL:O/RC:C","cvssSource":"cna","cwe":["CWE-122"],"vendor":"Microsoft","product":"Microsoft Exchange Server 2016 Cumulative Update 23","affected":["exchange_server_2016_cumulative_update_23 >= 15.01.0.0 < 15.01.2507.072","exchange_server_2019_cumulative_update_14 >= 15.02.0.0 < 15.02.1544.044","exchange_server_2019_cumulative_update_15 >= 15.02.0.0 < 15.02.1748.049","exchange_server_subscription_edition_rtm >= 15.02.0.0 < 15.02.2562.046"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-08-06T00:00:00+00:00"},"published":"2026-08-11","updated":"2026-09-16","sourceUpdated":"2026-09-16T16:24:12.304Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-62913","references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-62913","label":"Microsoft Exchange Server Remote Code Execution Vulnerability"}],"tags":["cve.org"],"epss":0.00652,"epssPercentile":0.49846,"ingestedAt":"2026-09-08T18:07:34.897Z","slug":"CVE-2026-62913","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_cumulative_update_23 >= 15.01.0.0 < 15.01.2507.072`\n- `exchange_server_2019_cumulative_update_14 >= 15.02.0.0 < 15.02.1544.044`\n- `exchange_server_2019_cumulative_update_15 >= 15.02.0.0 < 15.02.1748.049`\n- `exchange_server_subscription_edition_rtm >= 15.02.0.0 < 15.02.2562.046`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":49,"depthScoreParts":{"impact":48.4,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}