Moxa NPort W2150A-W4/W2250A-W4 up to 1.5 Web Management Interface stack-based overflow

Summaryinfo

A vulnerability has been found in Moxa NPort W2150A-W4 and W2250A-W4 up to 1.5 and classified as very critical. The impacted element is an unknown function of the component Web Management Interface. The manipulation leads to stack-based overflow. This vulnerability is referenced as CVE-2026-111548. Remote exploitation of the attack is possible. No exploit is available.

Detailsinfo

A vulnerability, which was classified as very critical, has been found in Moxa NPort W2150A-W4 and W2250A-W4 up to 1.5. This issue affects an unknown part of the component Web Management Interface. The manipulation with an unknown input leads to a stack-based overflow vulnerability. Using CWE to declare the problem leads to CWE-121. A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function). Impacted is confidentiality, integrity, and availability. The summary by CVE is:

A stack-based buffer overflow vulnerability exists in the web management interface of affected Moxa wireless device servers. An authenticated remote attacker with low privileges could exploit insufficient bounds checking of user-supplied input, causing the web management service to become unresponsive. Restoring the service requires power cycling the affected device, while other device functions remain operational.

It is possible to read the advisory at moxa.com. The identification of this vulnerability is CVE-2026-111548 since 10/16/2026. The exploitation is known to be easy. The attack may be initiated remotely. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 10/27/2026).

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

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Productinfo

Type

• Automation Software

Vendor

• Moxa

Name

• NPort W2150A-W4
• W2250A-W4

Version

• 1.0
• 1.1
• 1.2
• 1.3
• 1.4
• 1.5

License

• commercial

Website

• Vendor: https://www.moxa.com/

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