CVE-2026-44090

Missing authentication for MQTT Broker

Published Jul 30, 2026 CVSS 4.0 · 9.3 Critical EPSS < 1% KEV · Not listed
Description
Due to missing authentication, an unauthenticated remote attacker may access the MQTT broker, which is only protected from external access by a firewall. This may lead to the device being fully compromised.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Phoenixcontact
Phoenixcontact charx Sec-3000
Phoenixcontact charx Sec-3050
Phoenixcontact charx Sec-3100
Phoenixcontact charx Sec-3150
Vendors & Products Phoenixcontact
Phoenixcontact charx Sec-3000
Phoenixcontact charx Sec-3050
Phoenixcontact charx Sec-3100
Phoenixcontact charx Sec-3150
Type Values Removed Values Added
Description Due to missing authentication, an unauthenticated remote attacker may access the MQTT broker, which is only protected from external access by a firewall. This may lead to the device being fully compromised.
Title Missing authentication for MQTT Broker
First Time appeared Phoenix Contact
Phoenix Contact charx Sec 3000
Phoenix Contact charx Sec 3050
Phoenix Contact charx Sec 3100
Phoenix Contact charx Sec 3150
Weaknesses CWE-306
CPEs cpe:2.3:o:phoenix_contact:charx_sec_3000:*:*:*:*:*:*:*:*
cpe:2.3:o:phoenix_contact:charx_sec_3050:*:*:*:*:*:*:*:*
cpe:2.3:o:phoenix_contact:charx_sec_3100:*:*:*:*:*:*:*:*
cpe:2.3:o:phoenix_contact:charx_sec_3150:*:*:*:*:*:*:*:*
Vendors & Products Phoenix Contact
Phoenix Contact charx Sec 3000
Phoenix Contact charx Sec 3050
Phoenix Contact charx Sec 3100
Phoenix Contact charx Sec 3150
References
Metrics cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

cvssV4_0

{'score': 9.3, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}