Executive brief
Windows TCP/IP, the core networking stack used in all Windows systems, contains a flaw that allows an attacker on the network to circumvent a security feature. This could enable an attacker to bypass critical protections designed to prevent unauthorized network access or attacks, potentially leading to further compromise of the system or network.
Technical details
A vulnerability in Windows TCP/IP involves improper validation of consistency within input, which allows an attacker to bypass a security feature over a network. The flaw stems from insufficient input validation in the TCP/IP stack. An attacker with network access can exploit this vulnerability without requiring authentication or user interaction. The attack could result in circumventing network-level protections. Patches are expected to be available from Microsoft.
Affected products
- Microsoft Windows TCP/IP
Timeline
- 2026-09-08: disclosed