Description
Microsoft Exchange Server Elevation of Privilege Vulnerability
Affected products
microsoft: exchange server
References2
- msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21709 PatchVendor Advisory
- msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21709 PatchVendor Advisory
Metrics
- CVSS 3.1
-
9.8
CRITICAL
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - EPSS — exploit probability
- 2% percentile: 81 · as of 5 November 2026
- CWE
- CWE-307
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.