cve-2026-33837

CVE-2026-33837 is a Microsoft-disclosed Windows TCP/IP local elevation-of-privilege vulnerability rated Important. It involves a heap-based buffer overflow in tcpip.sys that allows an authorized low-privilege attacker to gain kernel-level privileges on affected systems. Microsoft rates exploitation as more likely, though the bug was not publicly disclosed or exploited when published. Fixes were shipped across a broad range of Windows versions. Discussions on WindowsForum.com focus on understanding the technical basis, assessing local attack scenarios, and applying the official patches to mitigate the risk of privilege escalation.