Patch Microsoft Outlook Now

Trend Micro has published a very well-documented page that explains the critical Outlook vulnerability and what you need to know to properly patch it.

CVE-2023-23397 is a critical privilege elevation/authentication bypass vulnerability in Outlook, released as part of the March Patch Tuesday set of fixes. The vulnerability, which affects all versions of Windows Outlook, was given a 9.8 CVSS rating and is one of two zero-day exploits disclosed on March 14.

Patch CVE-2023-23397 Immediately: What You Need To Know and Do (

Secure Cyber Defense highly recommends that you escalate this patch in your cycle and to commense patching immediately. As always, please make sure to properly test any patch before it enters your production environment.