[ CVE-2026-86326 · Published 2 Oct 2026 ]
Vulnerability in Moxa MGate MB3170 Series
[ Description ]Official description
An improper verification of cryptographic signature vulnerability exists in protocol gateways because the device does not properly verify the cryptographic authenticity of firmware images before installation. An attacker with high privileges and access to the firmware update interface could provide a specially crafted or modified firmware image, causing it to be installed on the device. Successful exploitation could allow the attacker to execute unauthorized code, compromise the integrity and availability of the device, and persist malicious modifications across subsequent firmware updates.
[ Fixes ]Fixes and patches
- Security bulletin: Moxa MPSA-269540Vendor patch or bulletin · CERT-FR · moxa.com/en/support/product-support/security-advisory/mpsa-269540-cve-, cited by CERT-FR CERTFR-2026-AVI-1250
[ Advisories ]Government CERT advisories
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CERT-FRCERTFR-2026-AVI-1250
Multiple vulnerabilities in Moxa products Translated from French
Multiple vulnerabilities have been discovered in Moxa products. They allow an attacker to cause a breach of data confidentiality, a breach of data integrity and a security policy bypass.