Cleartext Transmission Vulnerability in MQTT Protocol by Company
CVE-2026-69658

9.3CRITICAL

Key Information:

Vendor

Ebyte

Status
Ebyte Ne2-d11 Firmware
Vendor
CVE Published:
27 August 2026

What is CVE-2026-69658?

The vulnerability associated with the MQTT protocol involves the transmission of credentials and control traffic in cleartext. This exposes sensitive information to network-level attackers, potentially allowing unauthorized impersonation of devices and disruption of messaging functions. Organizations relying on MQTT should implement encryption to protect against these risks and secure their communications against interception.

Affected Version(s)

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

References

https://www.cisa.gov/news-events/ics-advisories/icsa-26-2...
https://github.com/cisagov/CSAF/blob/develop/csaf_files/O...

CVSS V4

Score:
9.3
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Jithin Nambiar reported this vulnerability to CISA.
.