#VU119438 Input validation error in Microsoft Exchange Server - CVE-2025-64666

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Main Vulnerability Database Vulnerabilities #VU119438

#VU119438 Input validation error in Microsoft Exchange Server - CVE-2025-64666

Published: December 9, 2025


Vulnerability identifier: #VU119438
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2025-64666
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vulnerable software:
Microsoft Exchange Server
Software vendor:
Microsoft

Description

The vulnerability allows a remote user to escalate privileges within the application.

The vulnerability exists due to insufficient validation of user-supplied input. A remote user can send a specially crafted request to the mail server and gain administrator privileges.


Remediation

Install updates from vendor's website.

External links