CVE-2023-23397
Microsoft Outlook Elevation of Privilege Vulnerability
- Published
- Mar 14, 2023
- Updated
- Oct 21, 2025
- Assigning CNA
- microsoft
- Evidence observed
- Mar 14, 2023
Primary CVSS
nvd · CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HHigh · next 30 days
- Percentile
- 99.9%
- Model date
- Oct 15, 2026
EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.
CISA Known Exploited
This CVE appears in the CISA Known Exploited Vulnerabilities catalog.
Summary
Microsoft Outlook Elevation of Privilege Vulnerability
Sources
PowerShell script to exploit CVE-2023-23397 by sending or saving malicious Outlook calendar invitations that trigger NTLM credential leakage via the ReminderSoundFile option.
Generates meeting requests taking advantage of CVE-2023-23397. This requires the outlook thick client to send.
- cve-2023-23397Exploit
Python script for sending e-mails with CVE-2023-23397 payload using SMTP
C# PoC exploit for CVE-2023-23397 that sends malicious Outlook meeting invites with a UNC path trigger for NTLM credential theft.
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