{"id":"CVE-2022-41040","aliases":["EUVD-2022-44285","GHSA-6ph7-8wxv-6gf2"],"status":"published","title":"Microsoft Exchange Server Elevation of Privilege Vulnerability","description":"Microsoft Exchange Server Elevation of Privilege Vulnerability","severity":{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.99956,"percentile":0.99975,"model":"v2026.06.15"},"facts":{"in_kev":true,"known_exploited":true,"public_exploit":true,"fix_available":false},"cwes":["CWE-269","CWE-918"],"published":"2022-10-03T00:00:00Z","modified":"2026-06-17T05:02:28Z","kev":{"date_added":"2022-09-30","due_date":"2022-10-21","required_action":"Apply updates per vendor instructions.","known_ransomware_use":"Known"},"exploitation":[{"source":"euvd","since":"2022-09-30"},{"source":"kev","since":"2022-09-30"}],"exploits":[{"source":"metasploit","id":"exploit/windows/http/exchange_proxynotshell_rce","title":"Microsoft Exchange ProxyNotShell 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server"},{"vendor":"microsoft","product":"exchange_server"},{"vendor":"microsoft","product":"microsoft exchange server 2013 cumulative update 23"},{"vendor":"microsoft","product":"microsoft exchange server 2016 cumulative update 22"},{"vendor":"microsoft","product":"microsoft exchange server 2016 cumulative update 23"},{"vendor":"microsoft","product":"microsoft exchange server 2019 cumulative update 11"},{"vendor":"microsoft","product":"microsoft exchange server 2019 cumulative update 12"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-41040","tags":["vendor-advisory","Patch","Vendor Advisory"]},{"url":"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2022-41040","tags":["x_transferred","Mitigation","Patch","Vendor Advisory"]},{"url":"https://www.kb.cert.org/vuls/id/915563","tags":["third-party-advisory","x_transferred","Third Party Advisory","US Government Resource"]},{"url":"http://packetstormsecurity.com/files/170066/Microsoft-Exchange-ProxyNotShell-Remote-Code-Execution.html","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/","tags":["x_transferred","Third Party Advisory"]},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2022-41040","tags":["government-resource","US Government Resource"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2022-41040"},{"url":"https://www.secpod.com/blog/microsoft-november-2022-patch-tuesday-patches-65-vulnerabilities-including-6-zero-days"},{"url":"https://github.com/advisories/GHSA-6ph7-8wxv-6gf2"}],"sources":{"cve":[{"id":"CVE-2022-41040","title":"Microsoft Exchange Server Elevation of Privilege Vulnerability","description":"Microsoft Exchange Server Elevation of Privilege 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Dubbed \"ProxyNotShell,\" this vulnerability is chainable with CVE-2022-41082 which allows for remote code execution.","cwes":["CWE-918"],"kev":{"date_added":"2022-09-30","due_date":"2022-10-21","required_action":"Apply updates per vendor instructions.","known_ransomware_use":"Known"},"updated_at":"2026-11-02T17:00:16.234141Z"}],"nvd":[{"id":"CVE-2022-41040","description":"Microsoft Exchange Server Elevation of Privilege Vulnerability","status":"published","published":"2022-10-03T01:15:08.753Z","modified":"2026-06-17T05:02:28.5Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-918"],"updated_at":"2026-11-02T14:07:29.026521Z"}]}}