CVE-2023-21674
HIGHCVSS 8.8/10Actively ExploitedEPSS 41.54%
Last modified
CVE-2023-21674 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. Windows Advanced Local Procedure Call (ALPC) Elevation of Privilege Vulnerability. CISA has confirmed active exploitation in the wild. EPSS estimates a 41.54% chance of exploitation in the next 30 days.
Description
Windows Advanced Local Procedure Call (ALPC) Elevation of Privilege Vulnerability
Metrics
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Exploitation Status
This vulnerability is listed in CISA’s Known Exploited Vulnerabilities catalog, confirming active exploitation in the wild. Federal agencies must remediate by .
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | Windows 10 1507 | < 10.0.10240.19685 |
| Microsoft | Windows 10 1607 | < 10.0.14393.5648 |
| Microsoft | Windows 10 1809 | < 10.0.17763.3887 |
| Microsoft | Windows 10 20h2 | < 10.0.19042.2486 |
| Microsoft | Windows 10 21h2 | < 10.0.19044.2486 |
| Microsoft | Windows 10 22h2 | < 10.0.19045.2486 |
| Microsoft | Windows 11 21h2 | < 10.0.22000.1455 |
| Microsoft | Windows 11 22h2 | < 10.0.22621.1105 |
| Microsoft | Windows Rt 8.1 | All versions |
| Microsoft | Windows Server 2012 | r2 |
| Microsoft | Windows Server 2016 | < 10.0.14393.5648 |
| Microsoft | Windows Server 2019 | < 10.0.17763.3887 |
| Microsoft | Windows Server 2022 | < 10.0.20348.1487 |
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
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
What is CVE-2023-21674?
Windows Advanced Local Procedure Call (ALPC) Elevation of Privilege Vulnerability
How severe is CVE-2023-21674?
CVE-2023-21674 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 41.54% probability of exploitation in the next 30 days. This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog.
How do I fix CVE-2023-21674?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2023-21674?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST