CVE-2025-64666
high
Microsoft CVSS v3 Base Score
7.5
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS Score
1.0%
Exploitation probability in 30 days
Top 42% most likely to be exploited
Attack Characteristics
Attack Vector
Network
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Confidentiality
High
Integrity
High
Availability
High
Published: December 9, 2025 (213 days ago)
Last Modified: June 15, 2026
Vendor: Microsoft
Source: NVD
Vulnerability Report
Generated by CyberWatcher
Description
Improper input validation in Microsoft Exchange Server allows an authorized attacker to elevate privileges over a network.
CWE
CWE-20Affected Products
microsoft exchange servermicrosoft exchange server subscription edition