CVE-2021-42286
HIGHCVSS 7.8/10EPSS 0.43%
Last modified
CVE-2021-42286 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. Windows Core Shell SI Host Extension Framework for Composable Shell Elevation of Privilege Vulnerability. EPSS estimates a 0.43% chance of exploitation in the next 30 days.
Description
Windows Core Shell SI Host Extension Framework for Composable Shell Elevation of Privilege Vulnerability
Metrics
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | Windows 10 | 20h2 |
| Microsoft | Windows 10 | 21h1 |
| Microsoft | Windows 10 | 2004 |
| Microsoft | Windows Server | 20h2 |
| Microsoft | Windows Server 2016 | 2004 |
References
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-42286Patch, Vendor Advisory
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-42286Patch, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-42286?
Windows Core Shell SI Host Extension Framework for Composable Shell Elevation of Privilege Vulnerability
How severe is CVE-2021-42286?
CVE-2021-42286 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.43% probability of exploitation in the next 30 days.
How do I fix CVE-2021-42286?
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.
Related CVEs from 2021
- CVE-2021-4228Use of hard-coded TLS certificate by default allows an attac…7.4
- CVE-2021-42280Windows Feedback Hub Elevation of Privilege Vulnerability5.5
- CVE-2021-42282Active Directory Domain Services Elevation of Privilege Vuln…7.5
- CVE-2021-42283NTFS Elevation of Privilege Vulnerability8.8
- CVE-2021-42284Windows Hyper-V Denial of Service Vulnerability6.8
- CVE-2021-42285Windows Kernel Elevation of Privilege Vulnerability7.8
- CVE-2021-42287Active Directory Domain Services Elevation of Privilege Vuln…7.5
- CVE-2021-42288Windows Hello Security Feature Bypass Vulnerability5.7
- CVE-2021-4229A vulnerability was found in ua-parser-js 0.7.29/0.8.0/1.0.0…8.8
- CVE-2021-42291Active Directory Domain Services Elevation of Privilege Vuln…7.5
- CVE-2021-42292Microsoft Excel Security Feature Bypass Vulnerability7.8
- CVE-2021-42293Microsoft Jet Red Database Engine and Access Connectivity En…6.5
Are you affected by CVE-2021-42286?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST