[ CVE-2023-23397 · Published 14 Mar 2023 ]
Microsoft Office Outlook Privilege Escalation Vulnerability
Exploited · CISA KEV CVSS 9.8
EPSS 97%Fix available
[ Why it matters ]Priority signals
- Exploited in the wild: on CISA's Known Exploited Vulnerabilities list since 2023-03-14
- EPSS: 97% chance of exploitation in the next 30 days (higher than 100% of CVEs)
- Critical severity: CVSS 9.8
[ Description ]Official description
Microsoft Outlook Elevation of Privilege Vulnerability
CISA: Microsoft Office Outlook contains a privilege escalation vulnerability that allows for a NTLM Relay attack against another service to authenticate as the user.
[ Fixes ]Fixes and patches
CISA required action (US federal deadline 4 Apr 2023): Apply updates per vendor instructions.
- Patch on msrc.microsoft.comVendor patch or bulletin · NVD · Reference tagged 'Patch' by NVD
[ References ]References
- msrc.microsoft.com/update-guide/vulnerability/CVE-2023-23397PatchVendor Advisory
- www.cisa.gov/known-exploited-vulnerabilities-catalogUS Government Resource