# Microsoft Windows (Schannel) vulnerabilities Source: https://junglewise.ai/threats/technologies/windows-schannel 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-schannel.json License: CC BY 4.0 with a link back Junglewise Threat Intelligence has tracked 3 vulnerabilities in Microsoft Windows (Schannel): 0 in the last 7 days and 3 in the last 90 days, 1 of them critical and 0 exploited in the wild. The most recent, CVE-2026-85818, was published on 13 October 2026. 1 vulnerability in the last four weeks, up from none in the four before. 1 critical against 0. ## Counts - Last 7 days: 0 - Last 30 days: 0 - Last 90 days: 3 - All time: 3 (1 critical, 0 exploited in the wild) ## About Microsoft Windows (Schannel) Windows Secure Channel (Schannel) cryptographic protocol provider for TLS/SSL communications. ## Latest Microsoft Windows (Schannel) vulnerabilities - [CVE-2026-85818: Windows Schannel cryptographic signature verification bypass](https://junglewise.ai/threats/cve-2026-85818-improper-verification-of-cryptographic-signature-in-windows) (critical, CVSS 9, published 13 Oct 2026) - [CVE-2026-72940: Microsoft Windows Schannel heap buffer overflow](https://junglewise.ai/threats/cve-2026-72940-microsoft-windows-schannel-heap-buffer-overflow) (high, CVSS 8.8, published 8 Sep 2026) - [CVE-2026-70575: Microsoft Windows Schannel null pointer dereference](https://junglewise.ai/threats/cve-2026-70575-microsoft-windows-schannel-null-pointer-dereference) (medium, CVSS 5.3, published 8 Sep 2026) ## Most severe Microsoft Windows (Schannel) vulnerabilities - [CVE-2026-85818: Windows Schannel cryptographic signature verification bypass](https://junglewise.ai/threats/cve-2026-85818-improper-verification-of-cryptographic-signature-in-windows) (critical, CVSS 9, published 13 Oct 2026) - [CVE-2026-72940: Microsoft Windows Schannel heap buffer overflow](https://junglewise.ai/threats/cve-2026-72940-microsoft-windows-schannel-heap-buffer-overflow) (high, CVSS 8.8, published 8 Sep 2026) - [CVE-2026-70575: Microsoft Windows Schannel null pointer dereference](https://junglewise.ai/threats/cve-2026-70575-microsoft-windows-schannel-null-pointer-dereference) (medium, CVSS 5.3, published 8 Sep 2026) ## Vulnerabilities per week 1 vulnerability in the last four weeks, up from none in the four before. 1 critical against 0. | 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 | 2 | 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 | 1 | 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 (Schannel) vulnerabilities", https://junglewise.ai/threats/technologies/windows-schannel, 13 November 2026.