# CVE-2026-69658: Ebyte NE2-D11 cleartext MQTT credentials transmission

Source: https://junglewise.ai/threats/cve-2026-69658-ebyte-ne2-d11-cleartext-mqtt-credentials-transmission  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-08-28. Updated: 2026-09-25  
License: CC BY 4.0 with a link back

CVE-2026-69658 · Severity: critical · CVSS 9.8 · Published 2026-08-28

The Ebyte NE2-D11 is an industrial IoT gateway device used to manage critical infrastructure communications. An attacker positioned on the network can intercept unencrypted MQTT credentials and control traffic, enabling unauthorized device impersonation, session hijacking, and disruption of messaging operations across connected systems.

Technologies: [Ebyte NE2-D11](https://junglewise.ai/threats/technologies/ne2-d11). Vendors: [Ebyte](https://junglewise.ai/threats/vendors/ebyte).

## Quick answers

**Is CVE-2026-69658 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-69658 being exploited in the wild.

**How severe is CVE-2026-69658?** Critical severity, with a CVSS score of 9.8, published 28 August 2026.

**Which products and versions are affected?** Ebyte NE2-D11 FW-9167-0-11.

**Is there a fix for CVE-2026-69658?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-69658 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2026-69658?** Check whether you run Ebyte NE2-D11 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.

## Technical details

CVE-2026-69658 is a cleartext transmission vulnerability in the Ebyte NE2-D11 web management interface, where MQTT credentials and control traffic are sent unencrypted over the network. The root cause is inadequate protection of sensitive communications; the device fails to enforce transport-layer encryption (TLS/SSL) for authentication and session-related information. An attacker with network-level access can passively intercept packets to capture credentials and session tokens, or actively impersonate the device or authenticated users. No authentication or user interaction is required; exploitation works on unpatched firmware FW-9167-0-11. Ebyte acknowledged the vulnerability and indicated a patch was under development, but has not provided status updates or released a fix to CISA.

## Affected products

- Ebyte NE2-D11 FW-9167-0-11

## Timeline

- 2026-08-25: disclosed
- 2026-08-28: advisory

## References

- [https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-237-06.json](https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-237-06.json)
- [https://www.cisa.gov/news-events/ics-advisories/icsa-26-237-06](https://www.cisa.gov/news-events/ics-advisories/icsa-26-237-06)

## Related threats

- [Ebyte NE2-D11 credentials exposure in configuration export](https://junglewise.ai/threats/cve-2026-77975-ebyte-ne2-d11-credentials-exposure-in-configuration-export)
- [Ebyte NE2-D11 privilege escalation via missing authorization](https://junglewise.ai/threats/cve-2026-77966-ebyte-ne2-d11-privilege-escalation-via-missing-authorization)
- [Ebyte NE2-D11 weak authentication hashing](https://junglewise.ai/threats/cve-2026-76133-ebyte-ne2-d11-weak-authentication-hashing)
- [Ebyte NE2-D11 missing authentication in management interface](https://junglewise.ai/threats/cve-2026-73819-ebyte-ne2-d11-missing-authentication-in-management-interface)
- [Ebyte NE2-D11 authentication bypass in configuration utility](https://junglewise.ai/threats/cve-2026-77977-ebyte-ne2-d11-authentication-bypass-in-configuration-utility)