# Microsoft Windows 11 21h2 vulnerabilities Source: https://junglewise.ai/threats/technologies/windows-11-21h2 Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats Updated: 13 November 2026, 03:07 UTC. Rebuilt every hour. Data: https://junglewise.ai/threats/technologies/windows-11-21h2.json License: CC BY 4.0 with a link back Junglewise Threat Intelligence has tracked 3 vulnerabilities in Microsoft Windows 11 21h2: 0 in the last 7 days and 1 in the last 90 days, 2 of them critical and 2 exploited in the wild. The most recent, CVE-2026-96943, was published on 13 October 2026. 1 vulnerability in the last four weeks, up from none in the four before. ## Counts - Last 7 days: 0 - Last 30 days: 0 - Last 90 days: 1 - All time: 3 (2 critical, 2 exploited in the wild) ## About Microsoft Windows 11 21h2 Windows 11 operating system version 21H2. ## Latest Microsoft Windows 11 21h2 vulnerabilities - [CVE-2026-96943: Microsoft Windows Raw Image Extension integer overflow](https://junglewise.ai/threats/cve-2026-96943-integer-overflow-or-wraparound-in-windows-raw-image-extension) (high, CVSS 8.8, published 13 Oct 2026) - [CVE-2024-38080: Microsoft Windows Hyper-V Privilege Escalation Vulnerability](https://junglewise.ai/threats/cve-2024-38080-microsoft-windows-hyper-v-privilege-escalation-vulnerability) (critical, exploited in the wild, CVSS 7.8, published 9 Jul 2024) - [CVE-2024-21412: Microsoft Windows Internet Shortcut Files Security Feature Bypass Vulnerability](https://junglewise.ai/threats/cve-2024-21412-microsoft-windows-internet-shortcut-files-security-feature-bypass) (critical, exploited in the wild, CVSS 8.1, published 13 Feb 2024) ## Most severe Microsoft Windows 11 21h2 vulnerabilities - [CVE-2024-21412: Microsoft Windows Internet Shortcut Files Security Feature Bypass Vulnerability](https://junglewise.ai/threats/cve-2024-21412-microsoft-windows-internet-shortcut-files-security-feature-bypass) (critical, exploited in the wild, CVSS 8.1, published 13 Feb 2024) - [CVE-2024-38080: Microsoft Windows Hyper-V Privilege Escalation Vulnerability](https://junglewise.ai/threats/cve-2024-38080-microsoft-windows-hyper-v-privilege-escalation-vulnerability) (critical, exploited in the wild, CVSS 7.8, published 9 Jul 2024) - [CVE-2026-96943: Microsoft Windows Raw Image Extension integer overflow](https://junglewise.ai/threats/cve-2026-96943-integer-overflow-or-wraparound-in-windows-raw-image-extension) (high, CVSS 8.8, published 13 Oct 2026) ## Vulnerabilities per week 1 vulnerability in the last four weeks, up from none in the four before. | Week of | Vulns | Critical | Exploited | | --- | --- | --- | --- | | 17 Aug 2026 | 0 | 0 | 0 | | 24 Aug 2026 | 0 | 0 | 0 | | 31 Aug 2026 | 0 | 0 | 0 | | 7 Sep 2026 | 0 | 0 | 0 | | 14 Sep 2026 | 0 | 0 | 0 | | 21 Sep 2026 | 0 | 0 | 0 | | 28 Sep 2026 | 0 | 0 | 0 | | 5 Oct 2026 | 0 | 0 | 0 | | 12 Oct 2026 | 1 | 0 | 0 | | 19 Oct 2026 | 0 | 0 | 0 | | 26 Oct 2026 | 0 | 0 | 0 | | 2 Nov 2026 | 0 | 0 | 0 | | 9 Nov 2026 | 0 | 0 | 0 | ## Other Microsoft technologies - [Microsoft Windows](https://junglewise.ai/threats/technologies/windows): 2,362 vulnerabilities - [Microsoft Windows 10](https://junglewise.ai/threats/technologies/windows-10): 589 vulnerabilities - [Microsoft Windows 11 24h2](https://junglewise.ai/threats/technologies/windows-11-24h2): 565 vulnerabilities - [Microsoft Windows 11 25h2](https://junglewise.ai/threats/technologies/windows-11-25h2): 534 vulnerabilities - [Microsoft Windows Server 2025](https://junglewise.ai/threats/technologies/windows-server-2025): 534 vulnerabilities - [Microsoft Windows Server 2022](https://junglewise.ai/threats/technologies/windows-server-2022): 528 vulnerabilities - [Microsoft Windows Server 2019](https://junglewise.ai/threats/technologies/windows-server-2019): 521 vulnerabilities - [Microsoft Windows Server 2012](https://junglewise.ai/threats/technologies/windows-server-2012): 517 vulnerabilities - [Microsoft Windows 11](https://junglewise.ai/threats/technologies/windows-11): 494 vulnerabilities - [Microsoft Windows Server 2016](https://junglewise.ai/threats/technologies/windows-server-2016): 476 vulnerabilities - [Microsoft Windows 10 1809](https://junglewise.ai/threats/technologies/windows-10-1809): 380 vulnerabilities - [Microsoft Windows 10 21h2](https://junglewise.ai/threats/technologies/windows-10-21h2): 373 vulnerabilities ## Sources NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories. Rebuilt every hour. Cite as: Junglewise Threat Intelligence, "Microsoft Windows 11 21h2 vulnerabilities", https://junglewise.ai/threats/technologies/windows-11-21h2, 13 November 2026.