Improper authentication in Microsoft Exchange Server - CVE-2025-53782
Published: October 14, 2025
Vulnerability identifier: #VU117029
CSH Severity: Low
CVSS v4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2025-53782
CWE-ID: CWE-287
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to bypass authentication process.
The vulnerability exists due to incorrect implementation of authentication process. A local user can execute arbitrary code with elevated privileges.
Affected software
Microsoft Exchange Server
How to mitigate CVE-2025-53782
Install updates from vendor's website.
Microsoft Exchange Server - addressed in versions SE RTM Oct25SU 15.02.2562.029, 2016 CU23 Oct25SU 15.01.2507.061, 2019 CU14 Oct25SU 15.02.1544.036, 2019 CU15 Oct25SU 15.02.1748.039