Is CVE-2018-20331 actively exploited?

No active exploitation of CVE-2018-20331 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2018-20331 be exploited remotely?

No. CVE-2018-20331 requires local access to exploit.

What is the CVSS score of CVE-2018-20331?

CVE-2018-20331 has a CVSS score of 7.8 (HIGH).

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HIGH

CVE-2018-20331

CWE-119Published: December 23, 2018· Updated: Jun 17, 2026

7.8

CVSS v3.1

Official Description

Local attackers can trigger a Kernel Pool Buffer Overflow in Antiy AVL ATool v1.0.0.22. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability. The specific flaw exists within the processing of IOCTL 0x80002004 by the ssdt.sys kernel driver. The bug is caused by failure to properly validate the length of the user-supplied data. An attacker can leverage this vulnerability to execute arbitrary code in the context of the kernel, which could lead to privilege escalation. A failed exploit could lead to denial of service.

NVD Source

Technical Analysis

CVE-2018-20331 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 7.8.

From a weakness classification perspective (CWE-119): Buffer overflow vulnerabilities can lead to arbitrary code execution or denial of service by corrupting adjacent memory.