What is CVE-2026-44090?

CVE-2026-44090 is a critical-severity vulnerability in Phoenix Contact Charx Sec-3000, classified under Missing Authentication for Critical Function. CVSS score: 9.8/10. Published 2026-07-30.

How severe is CVE-2026-44090?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Auth bypass in Phoenix Contact Charx Sec-3000

CVE-2026-44090

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.

Vulnerability class: Broken Authentication

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Phoenix Contact Charx Sec-3000 — versions 1.0.0
Phoenix Contact Charx Sec-3050 — versions 1.0.0
Phoenix Contact Charx Sec-3100 — versions 1.0.0
Phoenix Contact Charx Sec-3150 — versions 1.0.0

Weakness classification (CWE)

CWE-306 — Missing Authentication for Critical Function

References

info@cert.vde.com

Frequently asked questions

What is CVE-2026-44090?: CVE-2026-44090 is a critical-severity vulnerability in Phoenix Contact Charx Sec-3000, classified under Missing Authentication for Critical Function. CVSS score: 9.8/10. Published 2026-07-30.
How severe is CVE-2026-44090?: Critical severity. CVSS v3 base score is 9.8 out of 10.