#VU113714 Improper authentication in Microsoft Exchange Server - CVE-2025-53786
Published: August 6, 2025
Vulnerability identifier: #VU113714
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:H/AT:N/PR:H/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H/E:U/U:Green
CVE-ID: CVE-2025-53786
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 attacker to escalate privileges in hybrid deployments.
The vulnerability exists due to improper authentication. A remote user with privileged access to an on-premises Exchange server can escalate privileges within the organization’s connected cloud environment without leaving easily detectable and auditable trace.
Remediation
Install updates from vendor's website.