Zero-day vulnerability in Windows

Buffer overflow

Vulnerability details

Advisory: SB2021071322 - Privilege escalation in Microsoft Windows kernel

Vulnerable component: Windows

CVE-ID: CVE-2021-33771

CVSSv3 score: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:H/RL:O/RC:C

CWE-ID: CWE-119 - Memory corruption


The vulnerability allows a local user to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error. A local user can run a specially crafted program to trigger memory corruption and execute arbitrary code on the system with elevated privileges.

Note, the vulnerability is being actively exploited in the wild.

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