CVE-2025-53782 HIGH

CVE-2025-53782: Microsoft Exchange Server Elevation of Privilege Vulnerability

Vendor Microsoft
Product Microsoft Exchange Server 2016 Cumulative Update 23
Weakness CWE-303
Published October 14, 2025
Last update February 22, 2026
View on NVD All CVEs

CVSS base score

8.4/10
Attack vector Local
Attack complexity Low
Privileges required None
User interaction None
Confidentiality High
Integrity High

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

What the vulnerability does

01Description

Incorrect implementation of authentication algorithm in Microsoft Exchange Server allows an unauthorized attacker to elevate privileges locally.

Key dates

02Disclosure timeline

October 14, 2025 CVE published
February 22, 2026 Record updated