CVE-2026-40405
Null pointer dereference in Windows TCP/IP allows an unauthorized attacker to deny service over a network.
Published May 12, 2026 · updated Jun 17, 2026 · microsoft windows 11 24h2
Null pointer dereference in Windows TCP/IP allows an unauthorized attacker to deny service over a network.
Code
The project this record applies to. Exploit listings stay in References.
No public source repository is identified for this product.
Timeline
Detection, updates, and resolution for this record.
May 12, 2026 · NIST NVD
Detected
Null pointer dereference in Windows TCP/IP allows an unauthorized attacker to deny service over a network.
Jun 17, 2026 · NIST NVD
Updated
Null pointer dereference in Windows TCP/IP allows an unauthorized attacker to deny service over a network.
Affected
- cpe microsoft/windows 11 24h2version unspecified
- cpe microsoft/windows 11 25h2version unspecified
- cpe microsoft/windows 11 26h1version unspecified
- cpe microsoft/windows server 2025version unspecified
Sources
- CVE.orgVulnerability recordCVE-2026-40405
Official CVE identifier
cve.org - NIST NVDVulnerability recordCVE-2026-40405
Null pointer dereference in Windows TCP/IP allows an unauthorized attacker to deny service over a network.
nvd.nist.gov