CVE-2018-7842

CRITICAL

Modicon - Privilege Escalation

Title source: llm

Description

A CWE-290: Authentication Bypass by Spoofing vulnerability exists in all versions of the Modicon M580, Modicon M340, Modicon Quantum, and Modicon Premium which could cause an elevation of privilege by conducting a brute force attack on Modbus parameters sent to the controller.

Exploits (1)

nomisec WORKING POC

by yanissec · poc

https://github.com/yanissec/CVE-2018-7842

View Code ZIP pw:eip

References (2)

[Vendor Advisory] https://www.schneider-electric.com/en/download/document/SEVD-2019-134-11/

[Exploit, Third Party Advisory] https://www.talosintelligence.com/vulnerability_reports/TALOS-2018-0741

Scores

CVSS v3 9.8

EPSS 0.0817

EPSS Percentile 92.2%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Details

CWE

CWE-290

Status published

Products (4)

schneider-electric/modicon_m340_firmware

schneider-electric/modicon_m580_firmware

schneider-electric/modicon_premium_firmware

schneider-electric/modicon_quantum_firmware

Published May 22, 2019

Tracked Since Feb 18, 2026