CVE-2023-35311 HIGH

CVE-2023-35311: Microsoft Outlook Security Feature Bypass Vulnerability

Vendor Microsoft
Product Microsoft 365 Apps for Enterprise
Weakness CWE-367
KEV Status Known Exploited
Published July 11, 2023
Last update October 21, 2025
View on NVD All CVEs

CVSS base score

8.8/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction Required
Confidentiality High
Integrity High

CVSS vector

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

What the vulnerability does

01Description

Microsoft Outlook Security Feature Bypass Vulnerability

CISA mandated remediation

02CISA Required Action

Apply updates per vendor instructions or discontinue use of the product if updates are unavailable.

Key dates

03Disclosure timeline

July 11, 2023 CVE published
October 21, 2025 Record updated