Critical severity · published Jul 30, 2026
CVE-2026-44091
Creation of a new configuration by posting a malicious ID to MQTT
9.1
CVSS
0.6%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.6% · higher than 48% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CS
CHARX SEC-3000 · Phoenix Contact
1.0.0 before 1.9.1 · source: vendor
CS
CHARX SEC-3050 · Phoenix Contact
1.0.0 before 1.9.1 · source: vendor
CS
CHARX SEC-3100 · Phoenix Contact
1.0.0 before 1.9.1 · source: vendor
CS
CHARX SEC-3150 · Phoenix Contact
1.0.0 before 1.9.1 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-44091
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-44091
www.certvde.com
https://www.certvde.com/en/advisories/VDE-2026-008/
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