CVE-2023-23397
CRITICAL severity · CVSS 9.8 · Improper input validation · actively exploited (CISA KEV)
9.8CVSS CRITICAL exploited
Actively exploited in the wild (CISA Known Exploited Vulnerabilities).
Added to KEV 2023-03-14. US federal agencies must patch by 2023-04-04.
Summary
Microsoft Outlook Elevation of Privilege Vulnerability
Impact & exploitability
Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
Confidentiality impactHigh
Integrity impactHigh
Availability impactHigh
Exploit probability (EPSS)97%
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected products we track (2)
Recommendation
This vulnerability is being actively exploited in the wild — patch affected products urgently. Open any affected product above for its exact safe version.
Official patch: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-23397 ↗