Executive brief
A security vulnerability exists in the Windows TCP/IP component, which handles network communications for the operating system. An attacker who already has a basic user account on a target computer could exploit this flaw to view sensitive information that should normally be protected. While this does not allow an attacker to take over the system directly, it can be used to gather data for more complex subsequent attacks.
Technical details
An out-of-bounds read vulnerability (CWE-125) exists within the Microsoft Windows TCP/IP stack. The flaw is triggered when the component improperly handles memory buffers during network protocol processing. An attacker with local access and low-level user privileges can exploit this to read data from outside the intended memory range, potentially disclosing sensitive kernel or system information. The attack requires local authentication but no user interaction. Microsoft has released security updates to address this issue across affected Windows 10, 11, and Server 2012 versions.
Affected products
- Microsoft Windows 10 1607, 1809, 21H2, 22H2
- Microsoft Windows 11 24H2, 25H2, 26H1
- Microsoft Windows Server 2012 All editions
Timeline
- 2026-07-14: disclosed
- 2026-07-14: advisory