# Microsoft MsQuic vulnerabilities Source: https://junglewise.ai/threats/technologies/msquic Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats Updated: 19 October 2026, 03:07 UTC. Rebuilt every hour. Data: https://junglewise.ai/threats/technologies/msquic.json License: CC BY 4.0 with a link back Junglewise Threat Intelligence has tracked 3 vulnerabilities in Microsoft MsQuic: 0 in the last 7 days and 3 in the last 90 days, 3 of them critical and 0 exploited in the wild. The most recent, CVE-2026-105794, was published on 6 October 2026. 1 vulnerability in the last four weeks, level on the four before (1). 1 critical against 1. ## Counts - Last 7 days: 0 - Last 30 days: 1 - Last 90 days: 3 - All time: 3 (3 critical, 0 exploited in the wild) ## About Microsoft MsQuic MsQuic is a Microsoft implementation of the QUIC network protocol for fast, reliable data transmission. ## Latest Microsoft MsQuic vulnerabilities - [CVE-2026-105794: Microsoft MsQuic hostname validation bypass](https://junglewise.ai/threats/cve-2026-105794-msquic-is-a-cross-platform-c-implementation-of-the-ietf-quic) (critical, CVSS 4, published 6 Oct 2026) - [CVE-2026-62815: Microsoft QUIC use-after-free in path migration](https://junglewise.ai/threats/cve-2026-62815-microsoft-quic-use-after-free-in-path-migration) (critical, CVSS 9.8, published 8 Sep 2026) - [Microsoft QUIC use-after-free remote code execution](https://junglewise.ai/threats/microsoft-quic-use-after-free-remote-code-execution-bc730249) (critical, CVSS 9.8, published 11 Aug 2026) ## Most severe Microsoft MsQuic vulnerabilities - [CVE-2026-62815: Microsoft QUIC use-after-free in path migration](https://junglewise.ai/threats/cve-2026-62815-microsoft-quic-use-after-free-in-path-migration) (critical, CVSS 9.8, published 8 Sep 2026) - [Microsoft QUIC use-after-free remote code execution](https://junglewise.ai/threats/microsoft-quic-use-after-free-remote-code-execution-bc730249) (critical, CVSS 9.8, published 11 Aug 2026) - [CVE-2026-105794: Microsoft MsQuic hostname validation bypass](https://junglewise.ai/threats/cve-2026-105794-msquic-is-a-cross-platform-c-implementation-of-the-ietf-quic) (critical, CVSS 4, published 6 Oct 2026) ## Vulnerabilities per week 1 vulnerability in the last four weeks, level on the four before (1). 1 critical against 1. | Week of | Vulns | Critical | Exploited | | --- | --- | --- | --- | | 27 Jul 2026 | 0 | 0 | 0 | | 3 Aug 2026 | 0 | 0 | 0 | | 10 Aug 2026 | 1 | 1 | 0 | | 17 Aug 2026 | 0 | 0 | 0 | | 24 Aug 2026 | 0 | 0 | 0 | | 31 Aug 2026 | 0 | 0 | 0 | | 7 Sep 2026 | 1 | 1 | 0 | | 14 Sep 2026 | 0 | 0 | 0 | | 21 Sep 2026 | 0 | 0 | 0 | | 28 Sep 2026 | 0 | 0 | 0 | | 5 Oct 2026 | 1 | 1 | 0 | | 12 Oct 2026 | 0 | 0 | 0 | | 19 Oct 2026 | 0 | 0 | 0 | ## Other Microsoft technologies - [Microsoft Windows](https://junglewise.ai/threats/technologies/windows-): 1,706 vulnerabilities - [Microsoft Windows 10](https://junglewise.ai/threats/technologies/windows-10): 588 vulnerabilities - [Microsoft Windows 11](https://junglewise.ai/threats/technologies/windows-11): 493 vulnerabilities - [Microsoft Windows 11 24h2](https://junglewise.ai/threats/technologies/windows-11-24h2): 486 vulnerabilities - [Microsoft Windows Server 2012](https://junglewise.ai/threats/technologies/windows-server-2012): 473 vulnerabilities - [Microsoft Windows Server 2019](https://junglewise.ai/threats/technologies/windows-server-2019): 469 vulnerabilities - [Microsoft Windows Server 2022](https://junglewise.ai/threats/technologies/windows-server-2022): 461 vulnerabilities - [Microsoft Windows 11 25h2](https://junglewise.ai/threats/technologies/windows-11-25h2): 455 vulnerabilities - [Microsoft Windows Server 2016](https://junglewise.ai/threats/technologies/windows-server-2016): 427 vulnerabilities - [Microsoft Windows Server 2025](https://junglewise.ai/threats/technologies/windows-server-2025): 427 vulnerabilities - [Microsoft Windows 10 21h2](https://junglewise.ai/threats/technologies/windows-10-21h2): 359 vulnerabilities - [Microsoft Windows 10 22h2](https://junglewise.ai/threats/technologies/windows-10-22h2): 358 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 MsQuic vulnerabilities", https://junglewise.ai/threats/technologies/msquic, 19 October 2026.