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CVE-2026-86326

Quick assessment

Affected
Moxa MGate MB3170 Series
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

协议网关中存在加密签名验证不当的漏洞，因为设备在安装固件映像之前未正确验证其加密真实性。拥有高权限并能够访问固件更新接口的攻击者可以提供专门构造或篡改的固件映像，从而导致该映像被安装到设备上。成功利用此漏洞可能使攻击者能够执行未经授权的代码，破坏设备的完整性和可用性，并在后续固件更新中持久保留恶意修改。

CVSS 8.6 · High EPSS 0.19% · P8

Affected Version Matrix 2

VendorProduct Version RangeStatus
Moxa MGate MB3170 Series 1.0 affected
Moxa MGate MB3270 Series 1.0 affected
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I. Basic Information for CVE-2026-86326

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
密码学签名的验证不恰当
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Moxa MGate MB3170 Series 1.0 -
Moxa MGate MB3270 Series 1.0 -

II. Public POCs for CVE-2026-86326

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III. Intelligence Information for CVE-2026-86326

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Vendor Advisories for CVE-2026-86326 (1)

IV. Related Vulnerabilities

Same product: MGate MB3170 Series
Same vendor: Moxa
Same weakness: CWE-347

V. Comments for CVE-2026-86326

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