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CVE-2023-23397: Microsoft Office Outlook Privilege Escalation Vulnerability
Microsoft Office · in CISA KEV since 2023-03-14
2023-03-14added to KEV
2023-04-04federal remediation due date
97.41%EPSS exploit probability (30 days) 99.9th percentile
9.8 CRITICALCVSS 3.1
Unknownknown ransomware use
0days from NVD publication to KEV
What it is
Microsoft Office Outlook contains a privilege escalation vulnerability that allows for a NTLM Relay attack against another service to authenticate as the user.
Required action (CISA)
Apply updates per vendor instructions.
| CWE | CWE-294 |
|---|---|
| CVSS vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD published | 2023-03-14 (Analyzed) |
Original records: NVD · CISA KEV · JSON: /api/cve/CVE-2023-23397.json · all KEV CVEs
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Get the full file: Exploited Vulnerabilities Brief – September 2026 ($29): this month's KEV additions ranked by EPSS, ransomware use and due date, ready to hand to a patch team. Checkout by Polar.