CVE-2023-33379

Name: CVE-2023-33379
Creator: NVD / NIST
Published: 2023-08-04T18:15:12.937+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 0.69%

Last modified Jun 17, 2026

CVE-2023-33379 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. Connected IO v2.1.0 and prior has a misconfiguration in their MQTT broker used for management and device communication, which allows devices to connect to the broker and issue commands to other device, impersonating Connected IO management platform and sending commands to all of Connected IO's devices.. EPSS estimates a 0.69% chance of exploitation in the next 30 days.

Description

Connected IO v2.1.0 and prior has a misconfiguration in their MQTT broker used for management and device communication, which allows devices to connect to the broker and issue commands to other device, impersonating Connected IO management platform and sending commands to all of Connected IO's devices.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

0.69%

47.9th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Connectedio	Er2000t-Vz-Cat1 Firmware	<= 2.1.0

References

https://claroty.com/team82/disclosure-dashboard/cve-2023-33379Third Party Advisory
https://www.connectedio.com/products/routersProduct
https://claroty.com/team82/disclosure-dashboard/cve-2023-33379Third Party Advisory
https://www.connectedio.com/products/routersProduct

Timeline

Published: Aug 4, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-33379?

How severe is CVE-2023-33379?

CVE-2023-33379 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 0.69% probability of exploitation in the next 30 days.

How do I fix CVE-2023-33379?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-33379?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST