CVE-2025-55243 HIGH

CVE-2025-55243: Microsoft OfficePlus Spoofing Vulnerability

Vendor Microsoft
Product Microsoft OfficePLUS
Weakness CWE-200 · Info exposure
Published September 9, 2025
Last update February 20, 2026
View on NVD All CVEs

CVSS base score

7.5/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality High
Integrity None

CVSS vector

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

What the vulnerability does

01Description

Exposure of sensitive information to an unauthorized actor in Microsoft Office Plus allows an unauthorized attacker to perform spoofing over a network.

Key dates

02Disclosure timeline

September 9, 2025 CVE published
February 20, 2026 Record updated