CVE-2023-23397
CISA KEVPublished March 14, 2023 · Updated April 3, 2026
high
Official Description+
Microsoft Office Outlook contains a privilege escalation vulnerability that allows for a NTLM Relay attack against another service to authenticate as the user.
Affected Products
| Vendor | Product |
|---|---|
| Microsoft | Office |
Patch Status
Patch by 2023-04-04
Recommended Actions
- Check if your systems use any of the affected products listed above.
- Apply vendor patches immediately if available.
- This vulnerability is in CISA's Known Exploited Vulnerabilities catalog — prioritize remediation.
- Monitor vendor advisories for updates and additional mitigations.
- Review logs for indicators of compromise related to CVE-2023-23397.