{"id":"CVE-2026-69378","title":"Uncontrolled recursion in Microsoft Exchange Server allows an unauthorized attacker to deny service over a network.","summary":"Uncontrolled recursion in Microsoft Exchange Server allows an unauthorized attacker to deny service over a network.","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-674"],"vendor":"microsoft","product":"exchange_server","affected":["exchange_server = 2016","exchange_server = 2019","exchange_server_subscription_edition < 15.02.2562.049"],"patched":["exchange_server_subscription_edition 15.02.2562.049"],"published":"2026-09-08","updated":"2026-09-29","sourceUpdated":"2026-09-29T15:54:45.013","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-69378","references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69378","label":"secure@microsoft.com"}],"tags":["nvd","cve.org"],"epss":0.01174,"epssPercentile":0.67366,"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-09-08T20:41:18.591112Z"},"ingestedAt":"2026-09-08T19:08:49.610Z","slug":"CVE-2026-69378","body":"## Overview\n\nUncontrolled recursion in Microsoft Exchange Server allows an unauthorized attacker to deny service over a network.\n\n## Affected\n\n- `exchange_server = 2016`\n- `exchange_server = 2019`\n- `exchange_server_subscription_edition < 15.02.2562.049`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `exchange_server_subscription_edition 15.02.2562.049`","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0.2,"exploitation":0,"ransomware":0},"changes":[]}