CVE-2026-111548
Received Received - Intake

Stack-Based Buffer Overflow in Moxa Wireless Device Servers

Publication date: 2026-10-27

Last updated on: 2026-10-27

Assigner: Moxa Inc.

Description
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.

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Meta Information

Published
2026-10-27
Last Modified
2026-10-27
Generated
2026-10-27
AI Q&A
2026-10-27
EPSS Evaluated
N/A
NVD
CVE-2026-111548
EUVD
EUVD-2026-110697

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
Moxa NPort W2150A-W4/W2250A-W4 Series 1.0

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
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).

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Executive Summary

CVE-2026-111548 is a stack-based buffer overflow in the web management interface of Moxa wireless device servers (NPort W2150A-W4/W2250A-W4 and NPort W2150A/W2250A Series). An authenticated remote attacker with low privileges can exploit insufficient input validation to crash the web management service, requiring a power cycle to restore functionality while other device operations remain unaffected.

Detection Guidance

Detecting this vulnerability requires checking the firmware version of Moxa NPort W2150A-W4/W2250A-W4 or NPort W2150A/W2250A Series devices. Use the web management interface or CLI to verify firmware versions against the affected versions (v1.5 and earlier for W2150A-W4/W2250A-W4, v2.3 and earlier for W2150A/W2250A). Monitor for service crashes or unresponsiveness in the web management interface.

Commands may include logging into the device via SSH or web interface to check firmware version. Example: 'show version' or similar CLI command depending on device model.

Impact Analysis

This vulnerability allows an attacker to crash the web management service of affected Moxa devices, disrupting remote management capabilities. While other device functions remain operational, the crash requires a power cycle to restore access, potentially causing temporary loss of control and visibility over the device.

Mitigation Strategies

Immediately update firmware to the latest patched version (v1.5.9) if available for your device model. If patching is not possible, restrict network access to the device, disable unused services, enforce strong authentication, and monitor for anomalies in the web management interface.

Consider replacing end-of-life products if they cannot be updated. Implement network segmentation and secure remote access practices to reduce exposure.

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