{"schemaVersion":3,"id":"CVE-2023-36777","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"Microsoft Exchange Server Information Disclosure Vulnerability","dates":{"published":"2023-09-12T16:58:41.822Z","modified":"2025-10-30T18:18:16.416Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":5.7,"severity":"medium","version":"3.1","versionLabel":"v3.1","source":"CVE.org","vector":"CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"CVE.org","score":5.7,"severity":"medium","vector":"CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":5.7,"severity":"medium","vector":"CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.52011,"percentile":0.98954,"severity":"critical","asOf":"2026-10-21T00:00:00.000Z","change":{"pp":0,"baselineDate":"2026-09-21T00:00:00.000Z","baselineScore":0.52011},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.52011,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.52011,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.52011,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.52011,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.52011,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.52011,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.52011,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.52011,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.52011,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.52011,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.52011,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.52011,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.52011,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.52011,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.52011,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.52011,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.52011,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.52011,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.52011,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.52011,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.52011,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.52011,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.52011,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.52011,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.52011,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.52011,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.52011,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.52011,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.52011,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.52011,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.52011,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.52011,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.52011,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.52011,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.52011,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.52011,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.52011,"percentile":null},{"date":"2026-10-21T00:00:00.000Z","score":0.52011,"percentile":0.98954}],"last30":[{"date":"2026-09-21T00:00:00.000Z","score":0.52011,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.52011,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.52011,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.52011,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.52011,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.52011,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.52011,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.52011,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.52011,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.52011,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.52011,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.52011,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.52011,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.52011,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.52011,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.52011,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.52011,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.52011,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.52011,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.52011,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.52011,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.52011,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.52011,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.52011,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.52011,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.52011,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.52011,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.52011,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.52011,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.52011,"percentile":null},{"date":"2026-10-21T00:00:00.000Z","score":0.52011,"percentile":0.98954}]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[],"exploitCount":0,"weaknesses":[{"id":"CWE-502","name":"Deserialization of Untrusted Data","description":"The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.","type":"weakness","status":"Draft","abstraction":"Base","likelihoodOfExploit":"Medium","url":"https://cwe.mitre.org/data/definitions/502.html"}],"affected":[{"vendor":"microsoft","product":"exchange_server","name":"Exchange Server","label":"exchange_server","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"2016","noFixRecorded":false,"fixedIn":null},{"text":"2016:cumulative_update_1","noFixRecorded":false,"fixedIn":null},{"text":"2016:cumulative_update_10","noFixRecorded":false,"fixedIn":null},{"text":"2016:cumulative_update_11","noFixRecorded":false,"fixedIn":null},{"text":"2016:cumulative_update_12","noFixRecorded":false,"fixedIn":null},{"text":"2016:cumulative_update_13","noFixRecorded":false,"fixedIn":null},{"text":"2016:cumulative_update_14","noFixRecorded":false,"fixedIn":null},{"text":"2016:cumulative_update_15","noFixRecorded":false,"fixedIn":null},{"text":"2016:cumulative_update_16","noFixRecorded":false,"fixedIn":null},{"text":"2016:cumulative_update_17","noFixRecorded":false,"fixedIn":null},{"text":"2016:cumulative_update_18","noFixRecorded":false,"fixedIn":null},{"text":"2016:cumulative_update_19","noFixRecorded":false,"fixedIn":null},{"text":"2016:cumulative_update_2","noFixRecorded":false,"fixedIn":null},{"text":"2016:cumulative_update_20","noFixRecorded":false,"fixedIn":null},{"text":"2016:cumulative_update_21","noFixRecorded":false,"fixedIn":null},{"text":"2016:cumulative_update_22","noFixRecorded":false,"fixedIn":null},{"text":"2016:cumulative_update_3","noFixRecorded":false,"fixedIn":null},{"text":"2016:cumulative_update_4","noFixRecorded":false,"fixedIn":null},{"text":"2016:cumulative_update_5","noFixRecorded":false,"fixedIn":null},{"text":"2016:cumulative_update_6","noFixRecorded":false,"fixedIn":null},{"text":"2016:cumulative_update_7","noFixRecorded":false,"fixedIn":null},{"text":"2016:cumulative_update_8","noFixRecorded":false,"fixedIn":null},{"text":"2016:cumulative_update_9","noFixRecorded":false,"fixedIn":null},{"text":"2019","noFixRecorded":false,"fixedIn":null},{"text":"2019:cumulative_update_1","noFixRecorded":false,"fixedIn":null},{"text":"2019:cumulative_update_10","noFixRecorded":false,"fixedIn":null},{"text":"2019:cumulative_update_11","noFixRecorded":false,"fixedIn":null},{"text":"2019:cumulative_update_2","noFixRecorded":false,"fixedIn":null},{"text":"2019:cumulative_update_3","noFixRecorded":false,"fixedIn":null},{"text":"2019:cumulative_update_4","noFixRecorded":false,"fixedIn":null},{"text":"2019:cumulative_update_5","noFixRecorded":false,"fixedIn":null},{"text":"2019:cumulative_update_6","noFixRecorded":false,"fixedIn":null},{"text":"2019:cumulative_update_7","noFixRecorded":false,"fixedIn":null},{"text":"2019:cumulative_update_8","noFixRecorded":false,"fixedIn":null},{"text":"2019:cumulative_update_9","noFixRecorded":false,"fixedIn":null}],"versionsText":"2016 | 2016:cumulative_update_1 | 2016:cumulative_update_10 | 2016:cumulative_update_11 | 2016:cumulative_update_12 | 2016:cumulative_update_13 | 2016:cumulative_update_14 | 2016:cumulative_update_15 | 2016:cumulative_update_16 | 2016:cumulative_update_17 | 2016:cumulative_update_18 | 2016:cumulative_update_19 | 2016:cumulative_update_2 | 2016:cumulative_update_20 | 2016:cumulative_update_21 | 2016:cumulative_update_22 | 2016:cumulative_update_3 | 2016:cumulative_update_4 | 2016:cumulative_update_5 | 2016:cumulative_update_6 | 2016:cumulative_update_7 | 2016:cumulative_update_8 | 2016:cumulative_update_9 | 2019 | 2019:cumulative_update_1 | 2019:cumulative_update_10 | 2019:cumulative_update_11 | 2019:cumulative_update_2 | 2019:cumulative_update_3 | 2019:cumulative_update_4 | 2019:cumulative_update_5 | 2019:cumulative_update_6 | 2019:cumulative_update_7 | 2019:cumulative_update_8 | 2019:cumulative_update_9","eol":{"isEol":true,"eolDate":"2025-10-14T00:00:00.000Z","matchMethod":"cpe","cycle":{"name":"2016","label":"2016 CU23 SU19","eolFrom":"2025-10-14T00:00:00.000Z","isLts":false,"isMaintained":true,"latestVersion":"15.1.2507.61"},"product":{"name":"msexchange","label":"Microsoft Exchange","category":"server-app"}},"hubHref":"/vendor/microsoft/exchange_server"},{"vendor":"microsoft","product":"microsoft exchange server 2016 cumulative update 23","name":"Microsoft Exchange Server 2016 Cumulative Update 23","label":"microsoft exchange server 2016 cumulative update 23","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≥ 15.01.0, < 15.01.2507.032","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ 15.01.0, < 15.01.2507.032","eol":null,"hubHref":"/vendor/microsoft/microsoft_exchange_server_2016_cumulative_update_23"},{"vendor":"microsoft","product":"microsoft exchange server 2019 cumulative update 12","name":"Microsoft Exchange Server 2019 Cumulative Update 12","label":"microsoft exchange server 2019 cumulative update 12","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≥ 15.02.0, < 15.02.1118.037","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ 15.02.0, < 15.02.1118.037","eol":null,"hubHref":"/vendor/microsoft/microsoft_exchange_server_2019_cumulative_update_12"},{"vendor":"microsoft","product":"microsoft exchange server 2019 cumulative update 13","name":"Microsoft Exchange Server 2019 Cumulative Update 13","label":"microsoft exchange server 2019 cumulative update 13","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≥ 15.02.0, < 15.02.1258.025","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ 15.02.0, < 15.02.1258.025","eol":null,"hubHref":"/vendor/microsoft/microsoft_exchange_server_2019_cumulative_update_13"}],"affectedCount":4,"eol":{"hasEol":true,"count":1},"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-36777","label":"msrc.microsoft.com/update-guide/vulnerability/CVE-2023-36777","hostname":"msrc.microsoft.com","tags":["Vendor Advisory","Patch"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2023-09-12T16:58:41.822Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2025-10-30T18:18:16.416Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":33,"level":"medium","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-21T22:57:54.850Z","stale":false,"partial":false}}