HIGH 8.8 Microsoft
CVE-2026-45504
Microsoft Exchange Server Elevation of Privilege Vulnerability
Microsoft Security Update 2026-Jun: Microsoft Exchange Server Elevation of Privilege Vulnerability
Affected Products
- Microsoft Exchange Server Subscription Edition RTM
- Microsoft Exchange Server 2019 Cumulative Update 15
- Microsoft Exchange Server 2016 Cumulative Update 23
- Microsoft Exchange Server 2019 Cumulative Update 14
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45504
- https://nvd.nist.gov/vuln/detail/CVE-2026-45504
This high severity vulnerability with a CVSS score of 8.8 was published on 2026-06-09 via Microsoft. Affected: Microsoft Exchange Server Subscription Edition RTM, Microsoft Exchange Server 2019 Cumulative Update 15, Microsoft Exchange Server 2016 Cumulative Update 23 and 1 more.
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