# CVE-2026-111548: Moxa wireless device servers stack buffer overflow in web management

Source: https://junglewise.ai/threats/cve-2026-111548-a-stack-based-buffer-overflow-vulnerability-exists-in-the-web  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-27. Updated: 2026-10-27  
License: CC BY 4.0 with a link back

CVE-2026-111548 · Severity: info · Published 2026-10-27

Moxa wireless device servers used in industrial networks contain a buffer overflow flaw in their web management interface. An authenticated attacker with low privileges can crash the management service, requiring the device to be powered off and back on to restore it, though the device's other functions remain available. The advisory suggests scheduling an update in the next maintenance cycle.

Technologies: [Moxa NPort W2150A Series](https://junglewise.ai/threats/technologies/nport-w2150a-series), [Moxa NPort W2150A-W4 Series](https://junglewise.ai/threats/technologies/nport-w2150a-w4-series), [Moxa NPort W2250A Series](https://junglewise.ai/threats/technologies/nport-w2250a-series), [Moxa NPort W2250A-W4 Series](https://junglewise.ai/threats/technologies/nport-w2250a-w4-series). Vendors: [Moxa](https://junglewise.ai/threats/vendors/moxa).

## Quick answers

**Is CVE-2026-111548 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-111548 being exploited in the wild.

**How severe is CVE-2026-111548?** Informational severity, published 27 October 2026.

**Which products and versions are affected?** Moxa NPort W2150A Series v2.3 and earlier (end of life); Moxa NPort W2150A-W4 Series v1.5 and earlier; Moxa NPort W2250A Series v2.3 and earlier (end of life); Moxa NPort W2250A-W4 Series v1.5 and earlier.

**Is there a fix for CVE-2026-111548?** Yes: fixed in NPort W2150A-W4/W2250A-W4 Series v1.5.9 or later; NPort W2150A/W2250A Series: product replacement recommended. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-111548 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2026-111548?** Check whether you run Moxa NPort W2150A Series, Moxa NPort W2150A-W4 Series, Moxa NPort W2250A Series or one of the others listed at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- Fixed in NPort W2150A-W4/W2250A-W4 Series v1.5.9 or later; NPort W2150A/W2250A Series: product replacement recommended

## Technical details

A stack-based buffer overflow (CWE-121) exists in the web management interface due to insufficient bounds checking of user-supplied input. An authenticated remote attacker with low privileges can trigger this vulnerability, causing denial of service to the management service. Moxa has released security patches for affected product lines.

## Affected products

- Moxa NPort W2150A-W4 Series v1.5 and earlier
- Moxa NPort W2250A-W4 Series v1.5 and earlier
- Moxa NPort W2150A Series v2.3 and earlier (end of life)
- Moxa NPort W2250A Series v2.3 and earlier (end of life)

## Timeline

- 2026-10-27: disclosed

## References

- [https://www.moxa.com/en/support/product-support/security-advisory/mpsa-261250-cve-2026-111548-stack-buffer-overflow-vulnerability-in-wireless-device-servers](https://www.moxa.com/en/support/product-support/security-advisory/mpsa-261250-cve-2026-111548-stack-buffer-overflow-vulnerability-in-wireless-device-servers)

## Related threats

- [Moxa NPort W2150A/W2250A stack overflow in Server location parameter](https://junglewise.ai/threats/cve-2026-10829-moxa-nport-w2150a-w2250a-stack-overflow-in-server-location)
- [Moxa NPort W2150A/W2250A format string vulnerability in alias parameter](https://junglewise.ai/threats/cve-2026-10828-moxa-nport-w2150a-w2250a-format-string-vulnerability-in-alias)