Windows Shell Security Feature Bypass Vulnerability
CVE-2026-96951 is fixed in 34 products on 3 platforms, first by Microsoft Edge Dev 155.0.4273.0, released September 11, 2026. It is being exploited: CISA added it to the Known Exploited Vulnerabilities catalog on October 13, 2026. Patch Radar priority: Patch now.
<p>Improper neutralization of special elements used in a command ('command injection') in Windows Shell allows an unauthorized attacker to bypass a security feature over a network.</p>
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Microsoft | |||
| Windows 10 Version 1607 for 32-bit Systems | 14393.9612 | KB5126868 | Oct 13, 2026 |
| Windows 10 Version 1607 for x64-based Systems | 14393.9612 | KB5126868 | Oct 13, 2026 |
| Windows 10 Version 1809 for 32-bit Systems | 17763.9376 | KB5126651 | Oct 13, 2026 |
| Windows 10 Version 1809 for x64-based Systems | 17763.9376 | KB5126651 | Oct 13, 2026 |
| Windows 10 Version 21H2 for 32-bit Systems | KB5126657 | Oct 13, 2026 | |
| Windows 10 Version 21H2 for ARM64-based Systems | KB5126657 | Oct 13, 2026 | |
| Windows 10 Version 21H2 for x64-based Systems | KB5126657 | Oct 13, 2026 | |
| Windows 10 Version 22H2 for 32-bit Systems | KB5126657 | Oct 13, 2026 | |
| Windows 10 Version 22H2 for ARM64-based Systems | KB5126657 | Oct 13, 2026 | |
| Windows 10 Version 22H2 for x64-based Systems | KB5126657 | Oct 13, 2026 | |
| Windows 11 Version 23H2 for ARM64-based Systems | 22631.7652 | KB5126653 | Oct 13, 2026 |
| Windows 11 Version 23H2 for x64-based Systems | 22631.7652 | KB5126653 | Oct 13, 2026 |
| Windows 11 Version 24H2 for ARM64-based Systems | KB5127648 | Oct 13, 2026 | |
| Windows 11 Version 24H2 for x64-based Systems | KB5127648 | Oct 13, 2026 | |
| Windows 11 Version 25H2 for ARM64-based Systems | KB5127648 | Oct 13, 2026 | |
| Windows 11 Version 25H2 for x64-based Systems | KB5127648 | Oct 13, 2026 | |
| Windows 11 Version 26H1 for ARM64-based Systems | 28000.3231 | KB5127646 | Oct 13, 2026 |
| Windows 11 Version 26H2 for ARM64-based Systems | KB5127648 | Oct 13, 2026 | |
| Windows 11 Version 26H2 for x64-based Systems | KB5127648 | Oct 13, 2026 | |
| Windows 11 version 26H1 for x64-based Systems | 28000.3231 | KB5127646 | Oct 13, 2026 |
| Windows Server 2012 R2 | KB5126836 | Oct 13, 2026 | |
| Windows Server 2012 R2 (Server Core installation) | KB5126836 | Oct 13, 2026 | |
| Windows Server 2016 | 14393.9612 | KB5126868 | Oct 13, 2026 |
| Windows Server 2016 (Server Core installation) | 14393.9612 | KB5126868 | Oct 13, 2026 |
| Windows Server 2019 | 17763.9376 | KB5126651 | Oct 13, 2026 |
| Windows Server 2019 (Server Core installation) | 17763.9376 | KB5126651 | Oct 13, 2026 |
| Windows Server 2022 | 20348.5761 | KB5126655 | Oct 13, 2026 |
| Windows Server 2022 (Server Core installation) | 20348.5761 | KB5126655 | Oct 13, 2026 |
| Windows Server 2025 | 26100.33650 | KB5126646 | Oct 13, 2026 |
| Windows Server 2025 (Server Core installation) | 26100.33650 | KB5126646 | Oct 13, 2026 |
| Windows apps | |||
| Microsoft Edge | 154.0.4258.62 | Microsoft Edge 154.0.4258.62 | Oct 5, 2026 |
| Microsoft Edge Beta | 155.0.4283.33 | Microsoft Edge Beta 155.0.4283.33 | Oct 2, 2026 |
| Microsoft Edge Dev | 155.0.4273.0 | Microsoft Edge Dev 155.0.4273.0 | Sep 11, 2026 |
| Microsoft Edge WebView2 Runtime | 154.0.4258.62 | Microsoft Edge WebView2 Runtime 154.0.4258.62 | Oct 5, 2026 |
| macOS | |||
| Microsoft Edge | 154.0.4258.62 | Microsoft Edge 154.0.4258.62 | Oct 4, 2026 |
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