CVE-2025-2026
Unknown Unknown - Not Provided

Null Byte Injection in Moxa NPort Web API Causes DoS

Publication date: 2025-12-31

Last updated on: 2025-12-31

Assigner: Moxa Inc.

Description
The NPort 6100-G2/6200-G2 Series is affected by a high-severity vulnerability (CVE-2025-2026) that allows remote attackers to execute a null byte injection through the device’s web API. This may lead to an unexpected device reboot and result in a denial-of-service (DoS) condition. An authenticated remote attacker with web read-only privileges can exploit the vulnerable API to inject malicious input. Successful exploitation may cause the device to reboot, disrupting normal operations and causing a temporary denial of service.

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Meta Information

Published
2025-12-31
Last Modified
2025-12-31
Generated
2026-07-06
AI Q&A
2025-12-31
EPSS Evaluated
2026-07-05
NVD
CVE-2025-2026
EUVD
EUVD-2025-205901

Affected Vendors & Products

Showing 2 associated CPEs
Vendor Product Version / Range
moxa nport_6200-g2 4.0
moxa nport_6100-g2 4.0

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-170 The product does not terminate or incorrectly terminates a string or array with a null character or equivalent terminator.

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Executive Summary

This vulnerability affects the NPort 6100-G2/6200-G2 Series devices and allows a remote attacker with authenticated web read-only privileges to perform a null byte injection through the device's web API. This injection can cause the device to reboot unexpectedly.

Impact Analysis

Exploitation of this vulnerability can lead to an unexpected reboot of the affected device, causing a denial-of-service (DoS) condition that disrupts normal operations temporarily.

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