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CVE-2023-23397

KEV
Updated Oct 21, 2025 · PUBLISHED
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Description

Microsoft Office Outlook contains a privilege escalation vulnerability that allows for a NTLM Relay attack against another service to authenticate as the user.

Full record on cve.org →

Affected packages

PackageVendor / ProductVersion rangeStatus
Microsoft 365 Apps for EnterpriseMicrosoft / Microsoft 365 Apps for Enterprise>= 16.0.1, < https://aka.ms/OfficeSecurityReleasesaffected
Microsoft Office 2019Microsoft / Microsoft Office 2019>= 19.0.0, < https://aka.ms/OfficeSecurityReleasesaffected
Microsoft Office LTSC 2021Microsoft / Microsoft Office LTSC 2021>= 16.0.1, < https://aka.ms/OfficeSecurityReleasesaffected
Microsoft Outlook 2013 Service Pack 1Microsoft / Microsoft Outlook 2013 Service Pack 1>= 15.0.0.0, < 15.0.5537.1000affected
Microsoft Outlook 2016Microsoft / Microsoft Outlook 2016>= 16.0.0.0, < 16.0.5387.1000affected