VulnerabilityAnalyzed
CVE-2023-21674
Microsoft Windows Advanced Local Procedure Call (ALPC) Privilege Escalation Vulnerability
KEVHIGH 8.8EPSS 41.8%
Does this matter?
Known to be exploited in the wild (CISA KEV, CISA remediation deadline 31 January 2023). Treat as an emergency change: patch or isolate now, then hunt for prior compromise.
Description
Windows Advanced Local Procedure Call (ALPC) Elevation of Privilege Vulnerability
- CVSS 3.1
- 8.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
- EPSS
- 41.81% probability · 99th percentile
- CISA KEV
- Listed 10 January 2023 · due 31 January 2023
- Weakness
- CWE-416
- Affected
- microsoft/windows 10 1507 · microsoft/windows 10 1607 · microsoft/windows 10 1809 · microsoft/windows 10 20h2 · microsoft/windows 10 21h2 · microsoft/windows 10 22h2 · microsoft/windows 11 21h2 · microsoft/windows 11 22h2 · microsoft/windows rt 8.1 · microsoft/windows server 2012 · microsoft/windows server 2016 · microsoft/windows server 2019 · microsoft/windows server 2022
- Source
- secure@microsoft.com
CISA notes
Apply updates per vendor instructions. https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2023-21674; https://nvd.nist.gov/vuln/detail/CVE-2023-21674
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21674Patch, Vendor Advisory
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21674Patch, Vendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-21674US Government Resource
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.