HIGH 7.8 Microsoft
CVE-2026-55006
Microsoft Exchange Server Elevation of Privilege Vulnerability
Microsoft Security Update 2026-Jul: Microsoft Exchange Server Elevation of Privilege Vulnerability
Affected Products
- Microsoft Exchange Server 2019 Cumulative Update 14
- Microsoft Exchange Server 2019 Cumulative Update 15
- Microsoft Exchange Server 2016 Cumulative Update 23
- Microsoft Exchange Server Subscription Edition RTM
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-55006
- https://nvd.nist.gov/vuln/detail/CVE-2026-55006
This high severity vulnerability with a CVSS score of 7.8 was published on 2026-07-14 via Microsoft. Affected: Microsoft Exchange Server 2019 Cumulative Update 14, Microsoft Exchange Server 2019 Cumulative Update 15, Microsoft Exchange Server 2016 Cumulative Update 23 and 1 more.
vulnfeed aggregates 9214 vulnerabilities from NVD, CISA KEV,
Ubuntu, Debian, Red Hat, Kubernetes, Exploit-DB, OSS-Security, GitHub and OpenStack — updated every 4 hours.