{"id":"CVE-2021-34470","aliases":["EUVD-2021-21125","GHSA-hxhm-28wc-v3qm"],"status":"published","title":"Microsoft Exchange Server Elevation of Privilege Vulnerability","description":"Microsoft Exchange Server Elevation of Privilege Vulnerability","severity":{"version":"3.1","score":8,"vector":"CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.04379,"percentile":0.91364,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":false},"cwes":["CWE-269"],"published":"2021-07-14T17:54:02Z","modified":"2026-08-10T18:30:39Z","exploits":[{"source":"pocgithub","id":"technion/CVE-2021-34470scanner","title":"technion/CVE-2021-34470scanner","date":"2021-07-29","url":"https://github.com/technion/CVE-2021-34470scanner"}],"products":[{"vendor":"microsoft","product":"exchange_server"},{"vendor":"microsoft","product":"microsoft exchange server 2013 cumulative update 23"},{"vendor":"microsoft","product":"microsoft exchange server 2016 cumulative update 21"},{"vendor":"microsoft","product":"microsoft exchange server 2019 cumulative update 10"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-34470","tags":["vendor-advisory","patch"]},{"url":"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-34470","tags":["x_refsource_MISC","x_transferred","Patch","Vendor Advisory"]},{"url":"http://packetstormsecurity.com/files/163706/Microsoft-Exchange-AD-Schema-Misconfiguration-Privilege-Escalation.html","tags":["x_refsource_MISC","x_transferred","Third Party Advisory","VDB Entry"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-34470"},{"url":"https://github.com/advisories/GHSA-hxhm-28wc-v3qm"}],"sources":{"cve":[{"id":"CVE-2021-34470","title":"Microsoft Exchange Server Elevation of Privilege Vulnerability","description":"Microsoft Exchange Server Elevation of Privilege Vulnerability","status":"published","published":"2021-07-14T17:54:02Z","modified":"2026-08-10T15:12:02.486Z","cvss":[{"version":"3.1","score":8,"vector":"CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","level":"high","assessor":"cna"}],"updated_at":"2026-11-02T14:33:11.244759Z"}],"euvd":[{"id":"EUVD-2021-21125","description":"Microsoft Exchange Server Elevation of Privilege Vulnerability","status":"published","published":"2021-07-14T17:54:02Z","modified":"2026-08-10T15:12:02Z","cvss":[{"version":"3.1","score":8,"vector":"CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","level":"high"}],"updated_at":"2026-11-02T18:02:03.704262Z"}],"ghsa":[{"id":"GHSA-hxhm-28wc-v3qm","title":"Microsoft Exchange Server Elevation of Privilege Vulnerability This CVE ID is unique from CVE...","description":"Microsoft Exchange Server Elevation of Privilege Vulnerability This CVE ID is unique from CVE-2021-33768, CVE-2021-34523.","status":"published","published":"2022-05-24T19:07:52Z","modified":"2026-08-10T18:30:39Z","cvss":[{"version":"3.1","score":8,"vector":"CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-269"],"updated_at":"2026-11-02T15:10:14.126548Z"}],"nvd":[{"id":"CVE-2021-34470","description":"Microsoft Exchange Server Elevation of Privilege Vulnerability","status":"published","published":"2021-07-14T18:15:11.13Z","modified":"2026-08-10T16:17:48.617Z","cvss":[{"version":"3.1","score":8,"vector":"CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"},{"version":"3.1","score":8,"vector":"CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"},{"version":"2.0","score":5.2,"vector":"AV:A/AC:L/Au:S/C:P/I:P/A:P","level":"medium","assessor":"primary"}],"updated_at":"2026-11-02T14:06:55.747384Z"}]}}