Cloud Vulnerability DB
An open project to list all known cloud vulnerabilities and Cloud Service Provider security issues
Vulnerability DatabaseCVE-2023-21709
CVE-2023-21709:
vulnerability analysis and mitigation
Overview
Microsoft Exchange Server Elevation of Privilege Vulnerability (CVE-2023-21709) was disclosed and patched in August 2023. This vulnerability affects Microsoft Exchange Server 2016 and 2019 installations, requiring immediate attention due to its critical severity rating (MSRC, NVD).
Technical details
The vulnerability has received a Critical CVSS v3.1 base score of 9.8, with the vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. It is classified under CWE-307 (Improper Restriction of Excessive Authentication Attempts) (NVD).
Impact
If successfully exploited, this vulnerability could allow an attacker to gain elevated privileges on affected Microsoft Exchange Server systems, potentially compromising the confidentiality, integrity, and availability of the server (MSRC).
Mitigation and workarounds
Microsoft has released security updates to address this vulnerability. The fix is included in the August 2023 security update (KB5029388), which was later re-released as KB5030524 to address installation issues on non-English operating systems (Microsoft Support).
Additional resources
Source: This report was generated using AI
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