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Status published
High
CVE-2025-64666
Microsoft Exchange Server Elevation of Privilege Vulnerability
Vulnerability Description
Improper input validation in Microsoft Exchange Server allows an authorized attacker to elevate privileges over a network.
Impact Analysis
Refer to official advisory for detailed impact metrics.
Remediation
Ensure systems are updated to the latest vendor-supplied patch levels.
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Credits & Attribution
No credits recorded in the NVD database.
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Affected Vendor
Microsoft
View all reports →Affected Software
Microsoft Exchange Server 2016 Cumulative Update 23, Microsoft Exchange Server 2019 Cumulative Update 14, Microsoft Exchange Server 2019 Cumulative Update 15, Microsoft Exchange Server Subscription Edition RTM
Vulnerable Versions:
15.01.0.0, 15.02.0.0
Timeline
Official Publish:
December 9th, 2025
Last Modified:
April 16th, 2026
Added to House:
July 22nd, 2026
CVSS Vectors
V3:
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C