Is CVE-2018-16226 actively exploited?

No active exploitation of CVE-2018-16226 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2018-16226 be exploited remotely?

Yes. CVE-2018-16226 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2018-16226?

CVE-2018-16226 has a CVSS score of 6.1 (MEDIUM).

HOME VULNERABILITIESCVE-2018-16226

MEDIUM

CVE-2018-16226

CWE-79Published: October 23, 2018· Updated: Jun 17, 2026

6.1

CVSS v3.1

Official Description

A vulnerability in the web admin component of Mitel MiVoice Office 400, versions R5.0 HF3 (v8839a1) and earlier, could allow an unauthenticated attacker to conduct a reflected cross-site scripting (XSS) attack, due to insufficient validation for the start.asp page. A successful exploit could allow the attacker to execute arbitrary scripts to access sensitive browser-based information.

NVD Source

Technical Analysis

CVE-2018-16226 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation does not require any privileges, though user interaction (Required) is needed, which slightly reduces the risk of mass automated attacks.

The vulnerability has a "Changed" scope, meaning successful exploitation can impact components beyond the vulnerable component itself — such as the host operating system or adjacent services.

From a weakness classification perspective (CWE-79): Cross-site scripting (XSS) vulnerabilities allow attackers to inject malicious scripts into web pages viewed by other users.