Is CVE-2018-16666 actively exploited?

No active exploitation of CVE-2018-16666 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2018-16666 be exploited remotely?

No. CVE-2018-16666 requires local access to exploit.

What is the CVSS score of CVE-2018-16666?

CVE-2018-16666 has a CVSS score of 7.8 (HIGH).

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HIGH

CVE-2018-16666

CWE-787Published: September 7, 2018· Updated: Jun 17, 2026

7.8

CVSS v3.1

Official Description

An issue was discovered in Contiki-NG through 4.1. There is a stack-based buffer overflow in next_string in os/storage/antelope/aql-lexer.c while parsing AQL (parsing next string).

NVD Source

Technical Analysis

CVE-2018-16666 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-787): Out-of-bounds write vulnerabilities can lead to data corruption, crashes, or arbitrary code execution.