CVE-2023-35311highunder attackCWE-367

CVE-2023-35311: high-severity vulnerability in Microsoft 365 Apps for Enterprise

Microsoft Outlook Security Feature Bypass Vulnerability

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56Vexday Risk Score

Prioritize patching. It under exploitation confirmed by CISA.

ssvc Actcvss 8.8epss 16%
from disclosure to weapon
Published on NVDJul 11
CISA KEVJul 11
Action required by CISAfederal deadline: 2023-08-01

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

In short

Microsoft Outlook has a vulnerability that allows attackers to bypass security protections designed to block malicious content and suspicious attachments. This weakness could allow harmful emails or files to reach users who thought they were protected.

Technical detail

CWE-367 (Time-of-check Time-of-use race condition) in Outlook's security validation mechanisms allows an attacker to circumvent attachment or content filtering by exploiting a race condition between security checks and execution. The vulnerability requires user interaction or specific timing conditions and can result in execution of malicious code or delivery of phishing content.

Summary generated and translated by AI from the official description.

The full analysis of this CVE is available in Portuguese →

Microsoft Outlook Security Feature Bypass Vulnerability
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
Affected products
Microsoft · Microsoft 365 Apps for EnterpriseMicrosoft · Microsoft Office 2019Microsoft · Microsoft Office LTSC 2021Microsoft · Microsoft Outlook 2013Microsoft · Microsoft Outlook 2013 Service Pack 1Microsoft · Microsoft Outlook 2016
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