Network Thermostat X-Series WiFi Thermostats

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1. EXECUTIVE SUMMARY CVSS v4 9.3 ATTENTION: Exploitable remotely/low attack complexity Vendor: Network Thermostat Equipment: X-Series WiFi thermostats Vulnerability: Missing Authentication for Critical Function
2. RISK EVALUATION Successful exploitation of this vulnerability could allow an attacker to gain full administrative access to the device.
3. TECHNICAL DETAILS 3.1 AFFECTED PRODUCTS The following Network Thermostat product is affected: X-Series WiFi thermostats: Versions v4.5 up to but not including v4.6 X-Series WiFi thermostats: Versions v9.6 up to but not including v9.46 X-Series WiFi thermostats: Versions v10.1 up to but not including v10.29 X-Series WiFi thermostats: Versions v11.1 up to but not including v11.5 3.2 Vulnerability Overview 3.2.1 Missing Authentication for Critical Function CWE-306 The embedded web server on the thermostat listed version ranges contain a vulnerability that allows unauthenticated attackers, either on the Local Area Network or from the Internet via a router with port forwarding set up, to gain direct access to the thermostat’s embedded web server and reset user credentials by manipulating specific elements of the embedded web interface. CVE-2025-6260 has been assigned to this vulnerability. A CVSS v3.1 base score of 9.8 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H). A CVSS v4 score has also been calculated for CVE-2025-6260. A base score of 9.3 has been calculated; the CVSS vector string is (AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N). 3.3 BACKGROUND CRITICAL INFRASTRUCTURE SECTORS: Commercial Facilities COUNTRIES/AREAS DEPLOYED: USA, Canada COMPANY HEADQUARTERS LOCATION: United States 3.4 RESEARCHER Souvik Kandar reported this vulnerability to CISA.
4. MITIGATIONS Network Thermostat recommends users to update to the following (or newer) versions: X-Series WiFi thermostats with v4.x to a minimum of v4.6 X-Series WiFi thermostats with v9.x to a minimum of v9.46 X-Series WiFi thermostats with v10.x to a minimum of v10.29 X-Series WiFi thermostats with v11.x to a minimum of v11.5 This update was applied automatically to reachable units, requiring no action from end users. If end users would like their units behind firewalls to be updated, contact Network Thermostat at support@networkthermostat.com to coordinate an update. CISA recommends users take defensive measures to minimize the risk of exploitation of this vulnerability, such as: Minimize network exposure for all control system devices and/or systems, ensuring they are not accessible from the internet. Locate control system networks and remote devices behind firewalls and isolating them from business networks. When remote access is required, use more secure methods, such as Virtual Private Networks (VPNs), recognizing VPNs may have vulnerabilities and should be updated to the most current version available. Also recognize VPN is only as secure as the connected devices. CISA reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures. CISA also provides a section for control systems security recommended practices on the ICS webpage on cisa.gov/ics. Several CISA products detailing cyber defense best practices are available for reading and download, including Improving Industrial Control Systems Cybersecurity with Defense-in-Depth Strategies. CISA encourages organizations to implement recommended cybersecurity strategies for proactive defense of ICS assets. Additional mitigation guidance and recommended practices are publicly available on the ICS webpage at cisa.gov/ics in the technical information paper, ICS-TIP-12-146-01B–Targeted Cyber Intrusion Detection and Mitigation Strategies. Organizations observing suspected malicious activity should follow established internal procedures and report findings to CISA for tracking and correlation against other incidents. No known public exploitation specifically targeting this vulnerability has been reported to CISA at this time.
5. UPDATE HISTORY July 24, 2025: Initial Publication