CVE-2023-33372

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.8% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2023-08-04 · updated 2026-06-17
Weakness: CWE-798

Description

Connected IO v2.1.0 and prior uses a hard-coded username/password pair embedded in their device's firmware used for device communication using MQTT. An attacker who gained access to these credentials is able to connect to the MQTT broker and send messages on behalf of devices, impersonating them. in order to sign and verify JWT session tokens, allowing attackers to sign arbitrary session tokens and bypass authentication.

Affected products

Connectedio Connected Io: through 2.1.0

References

https://claroty.com/team82/disclosure-dashboard/cve-2023-33372
https://www.connectedio.com/products/routers
https://claroty.com/team82/disclosure-dashboard/cve-2023-33372
https://www.connectedio.com/products/routers

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