{"schemaVersion":3,"id":"CVE-2022-41082","aliases":[],"status":"published","duplicateOf":null,"title":"Microsoft Exchange Server Remote Code Execution Vulnerability","description":"Microsoft Exchange Server Remote Code Execution Vulnerability","dates":{"published":"2022-10-03T00:00:00.000Z","modified":"2025-10-21T23:15:33.797Z","reserved":null,"kevAdded":["2022-09-30T00:00:00.000Z"],"kevDue":["2022-10-21T00:00:00.000Z"]},"cvss":{"headline":{"score":8,"severity":"high","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:H/A:H/E:P/RL:O/RC:C","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"CVE.org","score":8,"severity":"high","vector":"CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":8,"severity":"high","vector":"CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.9997,"percentile":0.99978,"severity":"critical","asOf":"2026-10-21T00:00:00.000Z","change":{"pp":0,"baselineDate":"2026-09-21T00:00:00.000Z","baselineScore":0.9997},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.9997,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.9997,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.9997,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.9997,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.9997,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.9997,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.9997,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.9997,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.9997,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.9997,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.9997,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.9997,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.9997,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.9997,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.9997,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.9997,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.9997,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.9997,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.9997,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.9997,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.9997,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.9997,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.9997,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.9997,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.9997,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.9997,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.9997,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.9997,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.9997,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.9997,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.9997,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.9997,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.9997,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.9997,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.9997,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.9997,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.9997,"percentile":null},{"date":"2026-10-21T00:00:00.000Z","score":0.9997,"percentile":0.99978}],"last30":[{"date":"2026-09-21T00:00:00.000Z","score":0.9997,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.9997,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.9997,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.9997,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.9997,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.9997,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.9997,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.9997,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.9997,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.9997,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.9997,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.9997,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.9997,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.9997,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.9997,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.9997,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.9997,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.9997,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.9997,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.9997,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.9997,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.9997,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.9997,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.9997,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.9997,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.9997,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.9997,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.9997,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.9997,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.9997,"percentile":null},{"date":"2026-10-21T00:00:00.000Z","score":0.9997,"percentile":0.99978}]},"kev":{"state":"listed","entries":[{"source":"cisa","sourceLabel":"CISA","dateAdded":"2022-09-30T00:00:00.000Z","dueDate":"2022-10-21T00:00:00.000Z","requiredAction":"Apply updates per vendor instructions.","name":"Microsoft Exchange Server Remote Code Execution Vulnerability","description":"Microsoft Exchange Server contains an unspecified vulnerability that allows for authenticated remote code execution. Dubbed \"ProxyNotShell,\" this vulnerability is chainable with CVE-2022-41040 which allows for the remote code execution.","notes":[{"type":"url","href":"https://msrc-blog.microsoft.com/2022/09/29/customer-guidance-for-reported-zero-day-vulnerabilities-in-microsoft-exchange-server/","label":"msrc-blog.microsoft.com/2022/…"},{"type":"url","href":"https://nvd.nist.gov/vuln/detail/CVE-2022-41082","label":"nvd.nist.gov/vuln/detail/CVE-2022-41082"}],"vendor":"Microsoft","product":"Exchange Server","ransomware":true,"ransomwareUse":"Known","exploitationType":null}],"listedCount":1,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":true,"entry":{"source":"cisa","sourceLabel":"CISA","dateAdded":"2022-09-30T00:00:00.000Z","dueDate":"2022-10-21T00:00:00.000Z","requiredAction":"Apply updates per vendor instructions.","name":"Microsoft Exchange Server Remote Code Execution Vulnerability","description":"Microsoft Exchange Server contains an unspecified vulnerability that allows for authenticated remote code execution. Dubbed \"ProxyNotShell,\" this vulnerability is chainable with CVE-2022-41040 which allows for the remote code execution.","notes":[{"type":"url","href":"https://msrc-blog.microsoft.com/2022/09/29/customer-guidance-for-reported-zero-day-vulnerabilities-in-microsoft-exchange-server/","label":"msrc-blog.microsoft.com/2022/…"},{"type":"url","href":"https://nvd.nist.gov/vuln/detail/CVE-2022-41082","label":"nvd.nist.gov/vuln/detail/CVE-2022-41082"}],"vendor":"Microsoft","product":"Exchange Server","ransomware":true,"ransomwareUse":"Known","exploitationType":null}},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"known","sources":["cisa"]},"exploits":[{"id":"REF_074DB840E17473D4","name":"Exploit Reference (packetstormsecurity.com)","source":"reference","url":"http://packetstormsecurity.com/files/170066/Microsoft-Exchange-ProxyNotShell-Remote-Code-Execution.html","maturity":"unknown","reliabilityScore":0.2,"verified":false,"type":null,"platforms":[],"requiresAuth":null,"exploitdb":null,"metasploit":null},{"id":"MSF_EXPLOIT_WINDOWS_HTTP_EXCHANGE_PROXYNOTSHELL_RCE","name":"Microsoft Exchange ProxyNotShell RCE","source":"metasploit","url":"https://github.com/rapid7/metasploit-framework/blob/master/modules/exploit/windows/http/exchange_proxynotshell_rce.rb","maturity":"weaponized","reliabilityScore":1,"verified":true,"type":"remote","platforms":[],"requiresAuth":true,"exploitdb":null,"metasploit":{"fullname":"exploit/windows/http/exchange_proxynotshell_rce","rank":"600","rankName":"excellent","postAuth":true,"check":true,"stability":["crash-safe"],"sideEffects":["artifacts-on-disk","ioc-in-logs"],"reliability":["repeatable-session"]}}],"exploitCount":2,"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":"2013:cumulative_update_23","noFixRecorded":false,"fixedIn":null},{"text":"2016:cumulative_update_22","noFixRecorded":false,"fixedIn":null},{"text":"2016:cumulative_update_23","noFixRecorded":false,"fixedIn":null},{"text":"2019:cumulative_update_11","noFixRecorded":false,"fixedIn":null},{"text":"2019:cumulative_update_12","noFixRecorded":false,"fixedIn":null}],"versionsText":"2013:cumulative_update_23 | 2016:cumulative_update_22 | 2016:cumulative_update_23 | 2019:cumulative_update_11 | 2019:cumulative_update_12","eol":{"isEol":null,"eolDate":null,"matchMethod":"cpe","cycle":null,"product":{"name":"msexchange","label":"Microsoft Exchange","category":"server-app"}},"hubHref":"/vendor/microsoft/exchange_server"},{"vendor":"microsoft","product":"microsoft exchange server 2013 cumulative update 23","name":"Microsoft Exchange Server 2013 Cumulative Update 23","label":"microsoft exchange server 2013 cumulative update 23","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≥ 15.00.0, < 15.00.1497.044","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ 15.00.0, < 15.00.1497.044","eol":null,"hubHref":"/vendor/microsoft/microsoft_exchange_server_2013_cumulative_update_23"},{"vendor":"microsoft","product":"microsoft exchange server 2016 cumulative update 22","name":"Microsoft Exchange Server 2016 Cumulative Update 22","label":"microsoft exchange server 2016 cumulative update 22","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≥ 15.0.0, < 15.01.2375.037","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ 15.0.0, < 15.01.2375.037","eol":null,"hubHref":"/vendor/microsoft/microsoft_exchange_server_2016_cumulative_update_22"},{"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, < 15.01.2507.016","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ 15.01.0, < 15.01.2507.016","eol":null,"hubHref":"/vendor/microsoft/microsoft_exchange_server_2016_cumulative_update_23"},{"vendor":"microsoft","product":"microsoft exchange server 2019 cumulative update 11","name":"Microsoft Exchange Server 2019 Cumulative Update 11","label":"microsoft exchange server 2019 cumulative update 11","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≥ 15.02.0, < 15.02.0986.036","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ 15.02.0, < 15.02.0986.036","eol":null,"hubHref":"/vendor/microsoft/microsoft_exchange_server_2019_cumulative_update_11"},{"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, < 15.02.1118.020","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ 15.02.0, < 15.02.1118.020","eol":null,"hubHref":"/vendor/microsoft/microsoft_exchange_server_2019_cumulative_update_12"}],"affectedCount":6,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-41082","label":"msrc.microsoft.com/update-guide/vulnerability/CVE-2022-41082","hostname":"msrc.microsoft.com","tags":["Vendor Advisory"]},{"url":"https://www.vicarius.io/vsociety/posts/cve-2022-41082-microsoft-exchange-server-remote-code-execution-vulnerability-detection-script","label":"www.vicarius.io/vsociety/…","hostname":"www.vicarius.io","tags":["Third Party Advisory"]},{"url":"https://www.vicarius.io/vsociety/posts/cve-2022-41082-microsoft-exchange-server-remote-code-execution-vulnerability-mitigation-script","label":"www.vicarius.io/vsociety/…","hostname":"www.vicarius.io","tags":["Third Party Advisory"]},{"url":"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2022-41082","label":"portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2022-41082","hostname":"portal.msrc.microsoft.com","tags":["X Transferred","Patch","Vendor Advisory"]},{"url":"https://www.kb.cert.org/vuls/id/915563","label":"www.kb.cert.org/vuls/id/915563","hostname":"www.kb.cert.org","tags":["Third Party Advisory","X Transferred","US Government Resource"]},{"url":"http://packetstormsecurity.com/files/170066/Microsoft-Exchange-ProxyNotShell-Remote-Code-Execution.html","label":"packetstormsecurity.com/files/170066/Microsoft-Exchange-ProxyNotShell-Remote-Code-Execution.html","hostname":"packetstormsecurity.com","tags":["X Transferred","Exploit","Third Party Advisory","VDB Entry"]},{"url":"https://www.secpod.com/blog/microsoft-november-2022-patch-tuesday-patches-65-vulnerabilities-including-6-zero-days/","label":"www.secpod.com/blog/…","hostname":"www.secpod.com","tags":["X Transferred","Third Party Advisory"]},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2022-41082","label":"www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2022-41082","hostname":"www.cisa.gov","tags":["Government Resource","US Government Resource"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"kev-added","date":"2022-09-30T00:00:00.000Z","label":"Added to CISA KEV","detail":"Microsoft Exchange Server Remote Code Execution Vulnerability","source":"cisa"},{"kind":"published","date":"2022-10-03T00:00:00.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"kev-due","date":"2022-10-21T00:00:00.000Z","label":"CISA remediation due","detail":"Apply updates per vendor instructions.","source":"cisa"},{"kind":"modified","date":"2025-10-21T23:15:33.797Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":90,"level":"critical","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-21T23:55:40.249Z","stale":false,"partial":false}}