{"id":"CVE-2026-69378","aliases":["EUVD-2026-73128","GHSA-hp6f-8h4f-5pjq"],"status":"published","title":"Microsoft Exchange Server Denial of Service Vulnerability","description":"Uncontrolled recursion in Microsoft Exchange Server allows an unauthorized attacker to deny service over a network.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.01174,"percentile":0.67752,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-674"],"published":"2026-09-08T17:12:46Z","modified":"2026-10-31T16:11:33Z","products":[{"vendor":"microsoft","product":"exchange_server"},{"vendor":"microsoft","product":"exchange_server_subscription_edition"},{"vendor":"microsoft","product":"microsoft exchange server 2016 cumulative update 23"},{"vendor":"microsoft","product":"microsoft exchange server 2019 cumulative update 14"},{"vendor":"microsoft","product":"microsoft exchange server 2019 cumulative update 15"},{"vendor":"microsoft","product":"microsoft exchange server subscription edition rtm"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69378","tags":["vendor-advisory","patch","Patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-69378"},{"url":"https://github.com/advisories/GHSA-hp6f-8h4f-5pjq"}],"sources":{"cve":[{"id":"CVE-2026-69378","title":"Microsoft Exchange Server Denial of Service Vulnerability","description":"Uncontrolled recursion in Microsoft Exchange Server allows an unauthorized attacker to deny service over a network.","status":"published","published":"2026-09-08T17:12:46.915Z","modified":"2026-10-31T16:11:33.938Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C","level":"high","assessor":"cna"}],"cwes":["CWE-674"],"updated_at":"2026-11-02T13:50:27.582139Z"}],"euvd":[{"id":"EUVD-2026-73128","description":"Uncontrolled recursion in Microsoft Exchange Server allows an unauthorized attacker to deny service over a network.","status":"published","published":"2026-09-08T17:12:46Z","modified":"2026-10-31T16:11:33Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C","level":"high"}],"updated_at":"2026-11-02T16:58:59.513791Z"}],"ghsa":[{"id":"GHSA-hp6f-8h4f-5pjq","title":"Uncontrolled recursion in Microsoft Exchange Server allows an unauthorized attacker to deny...","description":"Uncontrolled recursion in Microsoft Exchange Server allows an unauthorized attacker to deny service over a network.","status":"published","published":"2026-09-08T18:32:28Z","modified":"2026-09-08T18:32:35Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-674"],"updated_at":"2026-11-02T15:11:30.562219Z"}],"nvd":[{"id":"CVE-2026-69378","description":"Uncontrolled recursion in Microsoft Exchange Server allows an unauthorized attacker to deny service over a network.","status":"published","published":"2026-09-08T18:18:58.543Z","modified":"2026-09-29T15:54:45.013Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-674"],"updated_at":"2026-11-02T14:12:44.840742Z"}]}}