CVE-2026-55040 CRITICAL

CVE-2026-55040: Microsoft SharePoint Server Security Feature Bypass Vulnerability

Vendor Microsoft
Product Microsoft SharePoint Enterprise Server 2016
Weakness CWE-1390
Published July 14, 2026
Last update July 24, 2026
View on NVD All CVEs

CVSS base score

9.1/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality High
Integrity High

CVSS vector

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

What the vulnerability does

01Description

Weak authentication in Microsoft Office SharePoint allows an unauthorized attacker to bypass a security feature over a network.

Key dates

02Disclosure timeline

July 14, 2026 CVE published
July 24, 2026 Record updated

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04Related CVE

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