CVE-2026-44091
CriticalCVSS 9.1Exploitation Probability (EPSS)
Low risk25th percentile - higher than 25% of all known CVEs
Summary
An unauthenticated remote attacker can post a malicious ID to the MQTT Broker, resulting in the creation of a new configuration entry in the system configuration. This may lead to integrity and availability loss.
Risk Assessment
Risk includes unauthorized modification of system configuration, potentially disrupting system operation.
Recommendation
Implement authentication and authorization for MQTT Broker access and validate all IDs before processing.
Other vulnerabilities in MQTT Broker
See all- CVE-2026-44090Critical
Missing authentication in the MQTT broker allows an unauthenticated remote attacker to access the broker, which is only protected from external access by a firewall. This may lead to full compromise of the device.
- CVE-2026-49186Critical
The local MQTT broker does not enforce topic-level Access Control Lists (ACLs). Any client can subscribe using wildcard characters (# or +) to enumerate hidden network devices or publish rogue control commands.
- CVE-2026-49198Medium
Improper access control in the MQTT broker allows wildcard topic subscriptions, exposing all MQTT traffic to unauthorized actors.
Original NVD description (English source)
An unauthenticated remote attacker can post a malicious ID to the MQTT Broker results in the creation of a new configuration entry in the system configuration. This may lead to integrity and availability loss.