CVE-2023-23397 kev in the critical feed json
Microsoft Outlook Elevation of Privilege Vulnerability
published 2023-03-14 3 y ago modified 2026-06-17 4 mo ago also EUVD-2023-27497
- cvss
- 9.8
- version 3.1, CNA
- cisa kev
- Exploited
- added 2023-03-14
- epss
- 97.2%
- EPSS 97.2% chance of exploitation in 30 days, percentile 99.8%
- public exploits
- 0
- none known
Summary
Microsoft Outlook Elevation of Privilege Vulnerability
Patch / fix
cisa required action Apply updates per vendor instructions.
- Microsoft Microsoft Outlook 2016 16.0.5387.1000
- Microsoft Microsoft Outlook 2013 Service Pack 1 15.0.5537.1000
Timeline
- 0-day patched (Project Zero)
- Added to CISA KEV
- Published
- CISA patch deadline
- CISA SSVC: exploitation active
Known exploited
- Added
- 3 y ago
- Patch by
- 2023-04-04 (3 y ago)
- Ransomware
- Not known
- Required action
- Apply updates per vendor instructions.
- Vendor, product
- Microsoft, Office
- CISA name
- Microsoft Office Outlook Privilege Escalation Vulnerability
Zero-day
Detected in real attacks while still unknown to the vendor and the public, per Google Project Zero's 0day In-the-Wild tracker.
- Patched
- 2023-03-14
- Details
- project zero tracker
ATT&CK techniques
How it is exploited and what it leads to, in MITRE ATT&CK terms.
- T1203 Exploitation for Client Execution exploitation
- T1550.002 Pass the Hash primary impact
- T1078 Valid Accounts secondary impact
kev release 2025-07-28, att&ck v16.1. KEV to ATT&CK mappings by the MITRE Center for Threat-Informed Defense (Mappings Explorer, Apache-2.0). © 2026 The MITRE Corporation. This work is reproduced and distributed with the permission of The MITRE Corporation. Terms of use
CISA SSVC
- Exploitation
- Active, exploited in the wild
- Automatable
- no
- Technical impact
- total
- Assessed
- 2 y ago
Exploit prediction
97.16% chance of exploitation in the next 30 days, higher than 99.8% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C |
| CNA | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
Affected products
- Microsoft Microsoft Office LTSC 2021
- Microsoft Microsoft Outlook 2016
- Microsoft Microsoft 365 Apps for Enterprise
- Microsoft Microsoft Office 2019
- Microsoft Microsoft Outlook 2013 Service Pack 1
Classification
References
-
msrc.microsoft.com
/update-guide/vulnerability/CVE-2023-23397
vendor-advisory, patch
-
cisa.gov
/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-23397
government-resource, us-government-resource
Sources
- CVE List CVE-2023-23397
- NVD CVE-2023-23397
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