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2 vulnerabilities found for IQ4NC by Honeywell
CVE-2026-3611 (GCVE-0-2026-3611)
Vulnerability from nvd – Published: 2026-03-12 20:06 – Updated: 2026-03-13 18:03
VLAI?
Title
Honeywell IQ4x BMS Controller Missing authentication for critical function
Summary
The Honeywell IQ4x building management controller, exposes its full web-based HMI without authentication in its factory-default configuration. With no user module configured, security is disabled by design and the system operates under a System Guest (level 100) context, granting read/write privileges to any party able to reach the HTTP interface. Authentication controls are only enforced after a web user is created via U.htm, which dynamically enables the user module. Because this function is accessible prior to authentication, a remote user can create a new account with administrative read/write permissions enabling the user module and imposing authentication under attacker-controlled credentials. This action can effectively lock legitimate operators out of local and web-based configuration and administration.
Severity ?
10 (Critical)
CWE
- CWE-306 - Missing authentication for critical function
Assigner
References
Impacted products
| Vendor | Product | Version | ||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Honeywell | IQ4E |
Affected:
v3.50_3.44 , ≤ 4.36 (build 4.3.7.9)
(custom)
|
||||||||||||||||||||||||||||||||
|
||||||||||||||||||||||||||||||||||
Date Public ?
2026-03-10 17:00
Credits
Gjoko Krstic of Zero Science reported this vulnerability to Honeywell.
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CVE-2026-3611 (GCVE-0-2026-3611)
Vulnerability from cvelistv5 – Published: 2026-03-12 20:06 – Updated: 2026-03-13 18:03
VLAI?
Title
Honeywell IQ4x BMS Controller Missing authentication for critical function
Summary
The Honeywell IQ4x building management controller, exposes its full web-based HMI without authentication in its factory-default configuration. With no user module configured, security is disabled by design and the system operates under a System Guest (level 100) context, granting read/write privileges to any party able to reach the HTTP interface. Authentication controls are only enforced after a web user is created via U.htm, which dynamically enables the user module. Because this function is accessible prior to authentication, a remote user can create a new account with administrative read/write permissions enabling the user module and imposing authentication under attacker-controlled credentials. This action can effectively lock legitimate operators out of local and web-based configuration and administration.
Severity ?
10 (Critical)
CWE
- CWE-306 - Missing authentication for critical function
Assigner
References
Impacted products
| Vendor | Product | Version | ||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Honeywell | IQ4E |
Affected:
v3.50_3.44 , ≤ 4.36 (build 4.3.7.9)
(custom)
|
||||||||||||||||||||||||||||||||
|
||||||||||||||||||||||||||||||||||
Date Public ?
2026-03-10 17:00
Credits
Gjoko Krstic of Zero Science reported this vulnerability to Honeywell.
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