CVE-2020-7540

high-risk

Published 2020-12-11

A CWE-306: Missing Authentication for Critical Function vulnerability exists in the Web Server on Modicon M340, Legacy Offers Modicon Quantum and Modicon Premium and associated Communication Modules (see security notification for affected versions), that could cause unauthenticated command execution in the controller when sending special HTTP requests.

Do I need to act?

0.31% chance of exploitation

EPSS score — low exploit probability

Not on CISA KEV list

No confirmed active exploitation reported to CISA

Patch status unknown

Check vendor advisories for fix availability and mitigation guidance

CVSS 9.8/10 Critical

NETWORK / LOW complexity

Affected Products (20)

Modicon M340 Bmxp341000 Firmware

Modicon M340 Bmxp342000 Firmware

Modicon M340 Bmxp3420102 Firmware

Modicon M340 Bmxp3420102Cl Firmware

Modicon M340 Bmxp342020 Firmware

Modicon M340 Bmxp3420302 Firmware

Modicon M340 Bmxp3420302Cl Firmware

Bmxnoe0100 Firmware

Bmxnoe0110 Firmware

140Noe77101 Firmware

140Noe77111 Firmware

140Cpu65150 Firmware

140Cpu65160 Firmware

140Noc78000 Firmware

140Noc78100 Firmware

140Noc77101 Firmware

Tsxp574634 Firmware

Tsxp575634 Firmware

Tsxp576634 Firmware

Tsxety4103 Firmware

Affected Vendors

Schneider-Electric

References (2)

Vendor Advisory https://www.se.com/ww/en/download/document/SEVD-2020-343-04/

/ 100

high-risk

Severity 32/34 · Critical

Exploitability 1/34 · Minimal

Exposure 21/34 · High