CVE-2021-42286
Windows Core Shell SI Host Extension Framework for Composable Shell Elevation of Privilege Vulnerability
Windows Core Shell SI Host Extension Framework for Composable Shell Elevation of Privilege Vulnerability
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
Windows Core Shell SI Host Extension Framework for Composable Shell Elevation of Privilege Vulnerability
Windows Core Shell SI Host Extension Framework for Composable Shell Elevation of Privilege Vulnerability
- Record
CVE-2021-42286- CVSS 3.1
- 7.8 High
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C - Updated
- 2026-11-02
EUVDEUVD-2021-29261
Windows Core Shell SI Host Extension Framework for Composable Shell Elevation of Privilege Vulnerability
- Record
EUVD-2021-29261- CVSS 3.1
- 7.8 High
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-gpw2-42fw-wq8h
Windows Core Shell SI Host Extension Framework for Composable Shell Elevation of Privilege...
Windows Core Shell SI Host Extension Framework for Composable Shell Elevation of Privilege Vulnerability
- Record
GHSA-gpw2-42fw-wq8h- CVSS 3.1
- 7.8 High
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-269
- Updated
- 2026-11-02
NVD
Windows Core Shell SI Host Extension Framework for Composable Shell Elevation of Privilege Vulnerability
- Record
CVE-2021-42286- CVSS 3.1
- 7.8 High
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - CVSS 2.0
- 4.6 Medium
AV:L/AC:L/Au:N/C:P/I:P/A:P - Weakness
- CWE-269
- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-42286 is a high vulnerability (CVSS 7.8) in Microsoft Windows 10 Version 2004, published November 10, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.49%, the 42nd percentile. No source names a fixed version.