High severity8.8NVD Advisory· Published Sep 8, 2026· Updated Sep 22, 2026
CVE-2026-72940
CVE-2026-72940
Description
Heap-based buffer overflow in Windows Schannel allows an unauthorized attacker to execute code over a network.
Affected products
1Patches
Vulnerability mechanics
References
1- msrc.microsoft.com/update-guide/vulnerability/CVE-2026-72940nvdPatchVendor Advisory
News mentions
4- Microsoft Patch Tuesday for September 2026 — Snort rules and prominent vulnerabilitiesCisco Talos Intelligence · Sep 8, 2026
- Patch Tuesday - September 2026Rapid7 Blog · Sep 8, 2026
- Microsoft Windows: 25 Vulnerabilities Disclosed, Including Critical Flaw and Exploited Zero-DayVypr Intelligence · Sep 8, 2026
- Massive Microsoft Patch Tuesday September 2026 – 973 Vulnerabilities Fixed, Including 2 Zero-DaysCyber Security News · Sep 8, 2026