Moxa MGate MB3170/MGate MB3270 up to 4.7 Account Management Interface account_name buffer overflow

Summaryinfo

A vulnerability was found in Moxa MGate MB3170 and MGate MB3270 up to 4.7. It has been rated as very critical. Affected is an unknown function of the component Account Management Interface. Performing a manipulation of the argument account_name results in buffer overflow. This vulnerability is cataloged as CVE-2026-86325. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability, which was classified as very critical, was found in Moxa MGate MB3170 and MGate MB3270 up to 4.7. This affects an unknown function of the component Account Management Interface. The manipulation of the argument account_name with an unknown input leads to a buffer overflow vulnerability. CWE is classifying the issue as CWE-120. The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

A stack-based buffer overflow vulnerability exists in protocol gateways' account management interface. The vulnerability is caused by insufficient length validation of the `account_name` parameter when processing account management requests. An attacker authenticated as a read-only user to the web management interface could supply a specially crafted account name that exceeds the size of the internal stack buffer, resulting in corruption of program execution flow. Successful exploitation could allow an attacker to read sensitive information from device memory, including credentials, modify arbitrary memory contents, and disrupt device availability.

The advisory is shared at moxa.com. This vulnerability is uniquely identified as CVE-2026-86325 since 09/07/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. Technical details are known, but no exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 10/02/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

• Automation Software

Vendor

• Moxa

Name

• MGate MB3170
• MGate MB3270

Version

• 4.0
• 4.1
• 4.2
• 4.3
• 4.4
• 4.5
• 4.6
• 4.7

License

• commercial

Website

• Vendor: https://www.moxa.com/

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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