CVE-2023-23397CISA KEV

Microsoft Office Outlook Privilege Escalation Vulnerability

Severity unknownCVSS unknownCheck the vendor advisory for fixed versions

CISA lists this Microsoft vulnerability as known exploited. Its MSRC release detail is outside this installation's collected history.

CISA KEV Check MSRC

CISA catalog record

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

Product: Office
Added to KEV: 14 Mar 2023
Federal remediation due: 4 Apr 2023
Known ransomware use: Not reported

Page history

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Field-level log (2)

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23 Oct 2026 · 09:33:49 UTC Source coverage: cisa-kevIncomplete → Current
23 Oct 2026 · 08:31:50 UTC Source coverage: cisa-kevCurrent → Incomplete

Explore global source statements, affected packages and advisory history for CVE-2023-23397. The catalog has a separate collection scope from Microsoft release records.

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CVE-2023-23397 · CVE overview and exploitation status

cve-program · CVE-2023-23397

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-23397

Related changes

Linked by CVE identifier

Microsoft Office Outlook Privilege Escalation Vulnerability · CISA KEV deadline · 4 Apr 2023
Microsoft Office Outlook Privilege Escalation Vulnerability · Added to CISA KEV · 14 Mar 2023