CVE-2026-86326: Moxa Mgate MB3170 Series
High severity, CVSS 8.6. EPSS: 0.2% chance of exploitation in the next 30 days.
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.
Affected products
Published 2026-10-02. Last modified 2026-10-02.