{"id":"CVE-2026-62912","title":"Microsoft Exchange Server Denial of Service Vulnerability","summary":"Deserialization of untrusted data in Microsoft Exchange Server allows an authorized attacker to deny service over a network.","severity":"medium","cvss":6.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C","cvssSource":"cna","cwe":["CWE-502"],"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":"partial","timestamp":"2026-08-12T13:26:37.523780Z"},"published":"2026-08-11","updated":"2026-09-24","sourceUpdated":"2026-09-24T13:45:02.132Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-62912","references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-62912","label":"Microsoft Exchange Server Denial of Service Vulnerability"}],"tags":["cve.org"],"epss":0.01976,"epssPercentile":0.79597,"ingestedAt":"2026-09-08T18:07:34.897Z","slug":"CVE-2026-62912","body":"## Overview\n\nDeserialization of untrusted data in Microsoft Exchange Server allows an authorized attacker to deny service 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":"sunlit","depthScore":36,"depthScoreParts":{"impact":35.8,"likelihood":0.4,"exploitation":0,"ransomware":0},"changes":[]}