high8.8
CVE-2026-72940
Heap-based buffer overflow in Windows Schannel allows an unauthorized attacker to execute code over a network.
Impact
Heap-based buffer overflow in Windows Schannel allows an unauthorized attacker to execute code over a network.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Microsoft | Windows 11 23h2 | before 10.0.22631.7582 |
| Microsoft | Windows 11 24h2 | before 10.0.26100.9445 |
| Microsoft | Windows 11 25h2 | before 10.0.26200.9445 |
| Microsoft | Windows 11 26h1 | before 10.0.28000.2954 |
| Microsoft | Windows Server 2022 | before 10.0.20348.5622 |
| Microsoft | Windows Server 2025 | before 10.0.26100.33438 |