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Critical · 9.8 Known exploited Public exploit CVE-2023-23397 EUVD-2023-27497GHSA-4778-q233-jmh5

Microsoft Outlook Elevation of Privilege Vulnerability

Published Mar 14, 2023 · Updated Oct 21, 2025 · Assigned by microsoft

Vendor: Microsoft Product: Microsoft 365 Apps for Enterprise Product: Microsoft Office 2019 Product: Microsoft Office LTSC 2021 Product: Microsoft Outlook 2013 Service Pack 1 Product: Microsoft Outlook 2016

Description

Microsoft Outlook Elevation of Privilege Vulnerability

Affected products

VendorProductAffectedFixed
Microsoft Microsoft Office LTSC 2021 16.0.1 – < https://aka.ms/OfficeSecurityReleases https://aka.ms/OfficeSecurityReleases
Microsoft Microsoft Outlook 2016 16.0.0.0 – < 16.0.5387.1000 16.0.5387.1000
Microsoft Microsoft 365 Apps for Enterprise 16.0.1 – < https://aka.ms/OfficeSecurityReleases https://aka.ms/OfficeSecurityReleases
Microsoft Microsoft Office 2019 19.0.0 – < https://aka.ms/OfficeSecurityReleases https://aka.ms/OfficeSecurityReleases
Microsoft Microsoft Outlook 2013 Service Pack 1 15.0.0.0 – < 15.0.5537.1000 15.0.5537.1000

Public exploits

Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.

Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.

GitHub 29 repositories · most starred shown

Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.

Advisories 1

References