CVE-2018-25396

Heatmiser Wifi Thermostat 1.7 Credential Disclosure via networkSetup.htm

Published May 29, 2026 CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed

Description

Heatmiser Wifi Thermostat 1.7 contains a credential disclosure vulnerability that allows unauthenticated attackers to retrieve administrative credentials by accessing the networkSetup.htm page. Attackers can request the networkSetup.htm endpoint and extract plaintext username and password values from HTML form fields to gain administrative access to the thermostat.

Analysis

Technical impact

Heatmiser Wifi Thermostat firmware version 1.7 contains a credential disclosure flaw that lets an unauthenticated attacker retrieve the administrator username and password by requesting the networkSetup.htm page. The vulnerability arises from the thermostat presenting these credentials in plaintext within HTML form fields, allowing direct extraction without prior authentication. This exposes the appliance to full administrative control, compromising both confidentiality and integrity.

Affected Systems

The affected product is the Heatmiser Wifi Thermostat running firmware 1.7. No other vendors, products, or firmware versions are listed as impacted.

Risk and Exploitability

The flaw has a CVSS score of 8.7, indicating a high severity. EPSS information is unavailable, so the current probability of exploitation cannot be quantified. The vulnerability is not listed in the CISA KEV catalog. Attackers can exploit it remotely by sending an unauthenticated HTTP request to the thermostat’s web interface, specifically the networkSetup.htm endpoint; the required conditions are simply network connectivity to the device.

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

Heatmiser

Heatmiser Wifi Thermostat

affected

Version	Status	Constraints
`1.7`	affected	—

No data.

Vendor Product Versions

Heatmiser

Heatmiser Wifi Thermostat

Version	Status	Scheme	Platform
`1.7`	affected	generic	—

Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

Update the thermostat firmware to a version that removes or protects the networkSetup.htm page or credentials.
Configure network access controls or firewall rules to block or restrict external access to the networkSetup.htm endpoint, allowing only trusted local devices to reach it.
If a patch is not available, change the device’s administrator credentials immediately and enforce a strong password policy.

Generated by OpenCVE AI on May 29, 2026 at 17:41 UTC.

Tracking

Advisories

No advisories available

Metrics

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact High

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact None

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact None

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploit prediction score: < 1% (0.313% probability within 30 days)

Exploitation poc

Automatable yes

Technical Impact partial

References

Link	Providers
https://www.exploit-db.com/exploits/45623
https://www.vulncheck.com/advisories/heatmiser-wifi-thermostat-credential-disclosure-via-networksetup-htm

History

Jul 28, 2026 2:30 AM First appearance in the feed. Affected versions updated. Affected vendors updated View changes

Type	Values Removed	Values Added
First Time appeared		Redhat Redhat thermostat
CPEs		cpe:2.3:a:redhat:thermostat:1.7:::::::*
Vendors & Products		Redhat Redhat thermostat

May 29, 2026 8:30 PM Scoring metrics updated View changes

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

May 29, 2026 6:00 PM First appearance in the feed. Affected vendors updated View changes

Type	Values Removed	Values Added
First Time appeared		Heatmiser Heatmiser heatmiser Wifi Thermostat
Vendors & Products		Heatmiser Heatmiser heatmiser Wifi Thermostat

May 29, 2026 4:15 PM Description updated. Title updated. Weaknesses updated. Added references. Scoring metrics updated View changes

Type	Values Removed	Values Added
Description		Heatmiser Wifi Thermostat 1.7 contains a credential disclosure vulnerability that allows unauthenticated attackers to retrieve administrative credentials by accessing the networkSetup.htm page. Attackers can request the networkSetup.htm endpoint and extract plaintext username and password values from HTML form fields to gain administrative access to the thermostat.
Title		Heatmiser Wifi Thermostat 1.7 Credential Disclosure via networkSetup.htm
Weaknesses		CWE-256
References		https://www.exploit-db.com/exploits/45623 https://www.vulncheck.com/advisories/heatmiser-wifi-thermostat-credential-disclosure-via-networksetup-htm
Metrics		cvssV3_1 `{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N'}` cvssV4_0 `{'score': 8.7, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N'}`