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.
History

Fri, 02 Oct 2026 12:00:00 +0000

Type Values Removed Values Added
Title Improper Cryptographic Signature Verification in Moxa MGate Firmware Update

Fri, 02 Oct 2026 11:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Fri, 02 Oct 2026 10:30:00 +0000

Type Values Removed Values Added
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.
First Time appeared Moxa
Moxa mgate Mb3170 Series
Moxa mgate Mb3270 Series
Weaknesses CWE-347
CPEs cpe:2.3:a:moxa:mgate_mb3170_series:1.0:*:*:*:*:*:*:*
cpe:2.3:a:moxa:mgate_mb3270_series:1.0:*:*:*:*:*:*:*
Vendors & Products Moxa
Moxa mgate Mb3170 Series
Moxa mgate Mb3270 Series
References
Metrics cvssV4_0

{'score': 8.6, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: Moxa

Published: 2026-10-02T10:21:56.863Z

Updated: 2026-10-02T10:39:59.785Z

Reserved: 2026-09-07T06:34:04.814Z

Link: CVE-2026-86326

cve-icon Vulnrichment

Updated: 2026-10-02T10:38:28.855Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-10-02T11:17:36.330

Modified: 2026-10-02T19:10:09.143

Link: CVE-2026-86326

cve-icon Redhat

No data.