Vulnerability Database

313,825

Total vulnerabilities in the database

CVE-2021-34523

Microsoft Exchange Server Elevation of Privilege Vulnerability

  • Published: Jul 14, 2021
  • Updated: Nov 4, 2025
  • CVE: CVE-2021-34523
  • Severity: Critical
  • Exploit:

CVSS v3:

  • Severity: Critical
  • Score: 9
  • AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N

CVSS v2:

  • Severity: High
  • Score: 7.5
  • AV:N/AC:L/Au:N/C:P/I:P/A:P

CWEs:

OWASP TOP 10:

Software From Fixed in
microsoft / exchange_server 2013-cumulative_update_23 2013-cumulative_update_23.x
microsoft / exchange_server 2019-cumulative_update_8 2019-cumulative_update_8.x
microsoft / exchange_server 2016-cumulative_update_19 2016-cumulative_update_19.x
microsoft / exchange_server 2016-cumulative_update_20 2016-cumulative_update_20.x
microsoft / exchange_server 2019-cumulative_update_9 2019-cumulative_update_9.x