VulnerabilityAnalyzed
CVE-2023-23397
Microsoft Office Outlook Privilege Escalation Vulnerability
KEVCRITICAL 9.8EPSS 97.4%
Does this matter?
Known to be exploited in the wild (CISA KEV, CISA remediation deadline 4 April 2023). Treat as an emergency change: patch or isolate now, then hunt for prior compromise.
Description
Microsoft Outlook Elevation of Privilege Vulnerability
- CVSS 3.1
- 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 97.41% probability · 100th percentile
- CISA KEV
- Listed 14 March 2023 · due 4 April 2023
- Weakness
- CWE-20, CWE-294
- Affected
- microsoft/365 apps · microsoft/office · microsoft/office long term servicing channel · microsoft/outlook
- Source
- secure@microsoft.com
CISA notes
Apply updates per vendor instructions. https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2023-23397, https://msrc.microsoft.com/blog/2023/03/microsoft-mitigates-outlook-elevation-of-privilege-vulnerability/, ; https://nvd.nist.gov/vuln/detail/CVE-2023-23397
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-23397Patch, Vendor Advisory
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-23397Patch, Vendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-23397US Government Resource
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.