Is CVE-2018-5780 actively exploited?

No active exploitation of CVE-2018-5780 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2018-5780 be exploited remotely?

Yes. CVE-2018-5780 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2018-5780?

CVE-2018-5780 has a CVSS score of 9.8 (CRITICAL).

HOME VULNERABILITIESCVE-2018-5780

CRITICAL

CVE-2018-5780

CWE-94Published: March 14, 2018· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

A vulnerability in the conferencing component of Mitel Connect ONSITE, versions R1711-PREM and earlier, and Mitel ST 14.2, release GA28 and earlier, could allow an unauthenticated attacker to inject PHP code using specially crafted requests to the vnewmeeting.php page. Successful exploit could allow an attacker to execute arbitrary PHP code within the context of the application.

NVD Source

Technical Analysis

CVE-2018-5780 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

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 9.8.