high7.5
CVE-2026-40405
Null pointer dereference in Windows TCP/IP allows an unauthorized attacker to deny service over a network.
Impact
Null pointer dereference in Windows TCP/IP allows an unauthorized attacker to deny service over a network.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Microsoft | Windows 11 24h2 | before 10.0.26100.8390 |
| Microsoft | Windows 11 25h2 | before 10.0.26200.8390 |
| Microsoft | Windows 11 26h1 | before 10.0.28000.2113 |
| Microsoft | Windows Server 2025 | before 10.0.26100.32772 |