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CVE-2023-23397
Microsoft Outlook Elevation of Privilege Vulnerability
Critical9.8Known exploitedEPSS 97.2%
- Published
- Updated
- Reserved
- Assigned by
- microsoft
Description
Microsoft Outlook Elevation of Privilege Vulnerability
Exploited in the wild
CISA lists this vulnerability in its Known Exploited Vulnerabilities catalog as Microsoft Office Outlook Privilege Escalation Vulnerability.
- Added
- 14 Mar 2023
- Fix due (US federal)
- 4 Apr 2023
- Used by ransomware
- Not known
Apply updates per vendor instructions.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| microsoftCNA (assigner) | 3.1 | Critical9.8 | 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 |
| NVDNVD · Analyzed | 3.1 | Critical9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 97.2% · top 0.1% of all CVEs (6 Nov 2026)
- CISA SSVC
- Exploitation: active · Automatable: no · Technical impact: total
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 9.8.
Weakness
Affected products
Microsoft · Microsoft Office LTSC 2021
- affected 16.0.1 – < https://aka.ms/OfficeSecurityReleases
Microsoft · Microsoft Outlook 2016
- affected 16.0.0.0 – < 16.0.5387.1000
Microsoft · Microsoft 365 Apps for Enterprise
- affected 16.0.1 – < https://aka.ms/OfficeSecurityReleases
Microsoft · Microsoft Office 2019
- affected 19.0.0 – < https://aka.ms/OfficeSecurityReleases
Microsoft · Microsoft Outlook 2013 Service Pack 1
- affected 15.0.0.0 – < 15.0.5537.1000
References (2)
- Microsoft Outlook Elevation of Privilege Vulnerability (opens in a new tab)vendor-advisoryx_transferred
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-23397 (opens in a new tab)government-resource
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- CISA KEV catalog (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2023-23397)Record last updated .