CVE-2026-3611

🗓️ 12 Mar 2026 20:06:05Reported by icscertType

cve🔗 web.nvd.nist.gov👁 30 Views🌐 WEB

Honeywell IQ4x controller exposes web HMI without authentication in factory default, enabling attacker account

Reporter	Title	Published	Views	Family All 11
ATTACKERKB	CVE-2026-3611	12 Mar 202620:06	–	attackerkb
Circl	CVE-2026-3611	10 Mar 202611:00	–	circl
CNNVD	Honeywell IQ4x 访问控制错误漏洞	12 Mar 202600:00	–	cnnvd
Cvelist	CVE-2026-3611 Honeywell IQ4x BMS Controller Missing authentication for critical function	12 Mar 202620:06	–	cvelist
EUVD	EUVD-2026-11706	12 Mar 202621:34	–	euvd
ICS	Honeywell IQ4 Series BMS Controller (Update A)	10 Mar 202606:00	–	ics
NVD	CVE-2026-3611	12 Mar 202621:16	–	nvd
Positive Technologies	PT-2026-24600	11 Mar 202600:00	–	ptsecurity
RedhatCVE	CVE-2026-3611	26 Mar 202615:04	–	redhatcve
Vulnrichment	CVE-2026-3611 Honeywell IQ4x BMS Controller Missing authentication for critical function	12 Mar 202620:06	–	vulnrichment

NVD

Vulners

Node

honeywell iq4e_firmwareRange<3.30

AND

honeywell iq4eMatch-

Node

honeywell iq412_firmwareRange<3.30

AND

honeywell iq412Match-

Node

honeywell iq422_firmwareRange<3.30

AND

honeywell iq422Match-

Node

honeywell iq4nc_firmwareRange<3.30

AND

honeywell iq4ncMatch-

Node

honeywell iq41x_firmwareRange<3.30

AND

honeywell iq41xMatch-

[
  {
    "vendor": "Honeywell",
    "product": "IQ4E",
    "versions": [
      {
        "status": "affected",
        "version": "v3.50_3.44",
        "lessThanOrEqual": "4.36 (build 4.3.7.9)",
        "versionType": "custom"
      }
    ],
    "defaultStatus": "unaffected"
  },
  {
    "vendor": "Honeywell",
    "product": "IQ412",
    "versions": [
      {
        "status": "affected",
        "version": "v3.50_3.44",
        "lessThanOrEqual": "4.36 (build 4.3.7.9)",
        "versionType": "custom"
      }
    ],
    "defaultStatus": "unaffected"
  },
  {
    "vendor": "Honeywell",
    "product": "IQ422",
    "versions": [
      {
        "status": "affected",
        "version": "v3.50_3.44",
        "lessThanOrEqual": "4.36 (build 4.3.7.9)",
        "versionType": "custom"
      }
    ],
    "defaultStatus": "unaffected"
  },
  {
    "vendor": "Honeywell",
    "product": "IQ4NC",
    "versions": [
      {
        "status": "affected",
        "version": "v3.50_3.44",
        "lessThanOrEqual": "4.36 (build 4.3.7.9)",
        "versionType": "custom"
      }
    ],
    "defaultStatus": "unaffected"
  },
  {
    "vendor": "Honeywell",
    "product": "IQ41x",
    "versions": [
      {
        "status": "affected",
        "version": "v3.50_3.44",
        "lessThanOrEqual": "4.36 (build 4.3.7.9)",
        "versionType": "custom"
      }
    ],
    "defaultStatus": "unaffected"
  },
  {
    "vendor": "Honeywell",
    "product": "IQ3",
    "versions": [
      {
        "status": "affected",
        "version": "v3.50_3.44",
        "lessThanOrEqual": "4.36 (build 4.3.7.9)",
        "versionType": "custom"
      }
    ],
    "defaultStatus": "unaffected"
  },
  {
    "vendor": "Honeywell",
    "product": "IQECO",
    "versions": [
      {
        "status": "affected",
        "version": "v3.50_3.44",
        "lessThanOrEqual": "4.36 (build 4.3.7.9)",
        "versionType": "custom"
      }
    ],
    "defaultStatus": "unaffected"
  }
]

Source	Link
honeywell	www.honeywell.com/us/en/contact
github	www.github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-069-03.json
cisa	www.cisa.gov/news-events/ics-advisories/icsa-26-069-03

Parameter	Position	Path	Description	CWE
ServerCommand	request body	U.htm	Unauthenticated web HMI allows creating an admin user and enabling authentication via U.htm.	CWE-306
ModuleFullName	request body	U.htm	Unauthenticated web HMI allows creating an admin user and enabling authentication via U.htm.	CWE-306
ovrideStart	request body	U.htm	Unauthenticated web HMI allows creating an admin user and enabling authentication via U.htm.	CWE-306
U0($)str	request body	U.htm	Unauthenticated web HMI allows creating an admin user and enabling authentication via U.htm.	CWE-306
U0($)origVal	request body	U.htm	Unauthenticated web HMI allows creating an admin user and enabling authentication via U.htm.	CWE-306
U0($)newVal	request body	U.htm	Unauthenticated web HMI allows creating an admin user and enabling authentication via U.htm.	CWE-306
U0($)req	request body	U.htm	Unauthenticated web HMI allows creating an admin user and enabling authentication via U.htm.	CWE-306
U0($)conf	request body	U.htm	Unauthenticated web HMI allows creating an admin user and enabling authentication via U.htm.	CWE-306
U0(W)str	request body	U.htm	Unauthenticated web HMI allows creating an admin user and enabling authentication via U.htm.	CWE-306
U0(W)origVal	request body	U.htm	Unauthenticated web HMI allows creating an admin user and enabling authentication via U.htm.	CWE-306

17 Jun 2026 10:43Current

5.8Medium risk

Vulners AI Score5.8

CVSS 3.110

CVSS 410

EPSS0.05585

SSVC

CWE-306