CVE-2026-69658

CRITICAL CVSS 4.0: 9.3 EPSS 0.24%
Updated Aug 31, 2026
MQTT
Parameter Value
CVSS 9.3 (CRITICAL)
Type CWE-319 (Cleartext Transmission)
Vendor MQTT
Public PoC No

MQTT credentials and control traffic are transmitted in cleartext, exposing sensitive information to network-level attackers. This may enable unauthorized device impersonation and disruption of messaging functions.

Attack Parameters

Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed

Impact Assessment

Confidentiality
High
Complete data leak
Integrity
High
Complete data modification
Availability
High
Complete denial of service

CVSS Vector v4.0