#VU117031 Improper authentication in Microsoft Exchange Server - CVE-2025-59249
Published: October 14, 2025
Vulnerability identifier: #VU117031
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:H/SI:H/SA:N/E:U/U:Green
CVE-ID: CVE-2025-59249
CWE-ID: CWE-287
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
Microsoft Exchange Server
Microsoft Exchange Server
Software vendor:
Microsoft
Microsoft
Description
The vulnerability allows a remote user to bypass authentication process.
The vulnerability exists due to usage of weak authentication process. A remote user can take over an admin account and use it to compromise mailboxes of other application users.
Remediation
Install updates from vendor's website.