CVE-2026-114170: Windows Kernel Elevation of Privilege Vulnerability
CVE-2026-114170 is an elevation of privilege vulnerability in Windows Kernel, rated Important by Microsoft, with a CVSS 3.1 base score of 7.8 (High). An attacker can exploit it by an attacker with local access, with low privileges and without user interaction. Microsoft has not reported exploitation in the wild and rates exploitation as less likely. Microsoft released the fix on 10 November 2026 in the November 2026 Patch Tuesday, delivered through 10 security updates (KB5127648, KB5126835, KB5126836, KB5126868 and more). It affects 32 products in 2 product families (Windows, ESU).
Key facts
- CVE ID
- CVE-2026-114170
- Severity
- High CVSS 7.8
- Microsoft severity
- Important
- Impact
- Elevation of Privilege
- Exploited in the wild
- No
- Publicly disclosed
- No
- Exploitation likelihood
- Less Likely
- CISA KEV
- Not listed
- Released
- Last updated
- Patch Tuesday
- November 2026 Patch Tuesday
- Product families
- Windows, ESU
CVSS score and vector
Microsoft scores CVE-2026-114170 at 7.8 (temporal 6.8) using CVSS 3.1. Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C
| Metric | Value |
|---|---|
| Attack vector | Local |
| Attack complexity | High |
| Privileges required | Low |
| User interaction | None |
| Scope | Changed |
| Confidentiality impact | High |
| Integrity impact | High |
| Availability impact | High |
| Exploit code maturity | Unproven |
| Remediation level | Official fix |
| Report confidence | Confirmed |
Description
Use after free in Windows Kernel allows an authorized attacker to elevate privileges locally.
Frequently asked questions (Microsoft)
What privileges could be gained by an attacker who successfully exploited this vulnerability?
An attacker who successfully exploited this vulnerability could gain SYSTEM privileges.
According to the CVSS metric, the attack complexity is high (AC:H). What does that mean for this vulnerability?
Successful exploitation requires the target system to be under sustained low-memory (memory pressure) conditions, which are not commonly present in normal operation. This makes the vulnerability difficult to reliably trigger, as the attacker must first induce or wait for a constrained memory state before exploitation becomes possible.
Affected products (32)
Windows
| Product | Security update | Type | Fixed build | Restart |
|---|---|---|---|---|
| Windows 11 Version 26H2 for ARM64-based Systems | KB5127648 | Security Update | 10.0.26300.9711 | Yes |
| Windows 11 Version 26H2 for x64-based Systems | KB5127648 | Security Update | 10.0.26300.9711 | Yes |
| Windows Server 2019 | KB5126651 | Security Update | 10.0.17763.9376 | Yes |
| Windows 10 Version 21H2 for 32-bit Systems | KB5126657 | Security Update | 10.0.19044.7807 | Yes |
| Windows Server 2022 | KB5126655 | Security Update | 10.0.20348.5761 | Yes |
| Windows Server 2022 (Server Core installation) | KB5126655 | Security Update | 10.0.20348.5761 | Yes |
| Windows 11 Version 24H2 for ARM64-based Systems | ||||
| Windows 11 Version 26H1 for ARM64-based Systems | KB5127646 | Security Update | 10.0.28000.3231 | Yes |
| Windows 11 version 26H1 for x64-based Systems | KB5127646 | Security Update | 10.0.28000.3231 | Yes |
| Windows 10 Version 1809 for 32-bit Systems | KB5126651 | Security Update | 10.0.17763.9376 | Yes |
| Windows 10 Version 1809 for x64-based Systems | KB5126651 | Security Update | 10.0.17763.9376 | Yes |
| Windows Server 2019 (Server Core installation) | KB5126651 | Security Update | 10.0.17763.9376 | Yes |
| Windows 10 Version 21H2 for ARM64-based Systems | KB5126657 | Security Update | 10.0.19044.7807 | Yes |
| Windows 10 Version 21H2 for x64-based Systems | KB5126657 | Security Update | 10.0.19044.7807 | Yes |
| Windows 11 Version 23H2 for ARM64-based Systems | KB5126653 | Security Update | 10.0.22631.7652 | Yes |
| Windows 11 Version 23H2 for x64-based Systems | KB5126653 | Security Update | 10.0.22631.7652 | Yes |
| Windows 11 Version 24H2 for x64-based Systems | ||||
| Windows 11 Version 25H2 for ARM64-based Systems | ||||
| Windows 11 Version 25H2 for x64-based Systems | ||||
| Windows Server 2025 | KB5126646 | Security Update | 10.0.26100.33650 | Yes |
| Windows Server 2025 (Server Core installation) | KB5126646 | Security Update | 10.0.26100.33650 | Yes |
ESU
| Product | Security update | Type | Fixed build | Restart |
|---|---|---|---|---|
| Windows Server 2012 | KB5126835 | Security Update | 6.2.9200.26434 | Yes |
| Windows Server 2012 R2 | KB5126836 | Monthly Rollup | 6.3.9600.23470 | Yes |
| Windows 10 Version 1607 for 32-bit Systems | KB5126868 | Security Update | 10.0.14393.9612 | Yes |
| Windows 10 Version 1607 for x64-based Systems | KB5126868 | Security Update | 10.0.14393.9612 | Yes |
| Windows Server 2016 | KB5126868 | Security Update | 10.0.14393.9612 | Yes |
| Windows Server 2016 (Server Core installation) | KB5126868 | Security Update | 10.0.14393.9612 | Yes |
| Windows 10 Version 22H2 for 32-bit Systems | ||||
| Windows Server 2012 (Server Core installation) | KB5126835 | Security Update | 6.2.9200.26434 | Yes |
| Windows Server 2012 R2 (Server Core installation) | KB5126836 | Monthly Rollup | 6.3.9600.23470 | Yes |
| Windows 10 Version 22H2 for ARM64-based Systems | ||||
| Windows 10 Version 22H2 for x64-based Systems |
Security updates (10)
Acknowledgments
- Anonymous
Revision history
| Version | Date | Description |
|---|---|---|
| 1.0 | Information published. |