CVE-2023-23397
9.8CRITICALMicrosoft Outlook Elevation of Privilege Vulnerability
Published: 3/14/2023Updated: 10/27/2025
CISA Known Exploited Vulnerability
Microsoft Office Outlook contains a privilege escalation vulnerability that allows for a NTLM Relay attack against another service to authenticate as the user.
Required Action:
Apply updates per vendor instructions.
Due Date:
2023-04-04
Description
Microsoft Outlook Elevation of Privilege Vulnerability
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Affected Products
microsoft365_apps
-
microsoftoffice
2019
microsoftoffice_long_term_servicing_channel
2021
microsoftoutlook
2013
microsoftoutlook
2013
microsoftoutlook
2016
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-23397PatchVendor Advisory
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-23397PatchVendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-23397US Government Resource