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Tycon Systems TPDIN-Monitor-WEB2

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Overview

Tycon Systems' TPDIN-Monitor-WEB2 has critical vulnerabilities that could allow attackers to bypass authentication and access sensitive controls of connected infrastructure. Specifically, the version 2.3.9 is affected by an authentication bypass flaw that enables unauthorized users to gain full administrative access by submitting empty login credentials. Additionally, another flaw reveals system credentials in cleartext, which could facilitate further network compromises. Users of this device are advised to contact Tycon Systems for updates and to ensure their systems are secure. These vulnerabilities pose serious risks, not only to data security but also to physical safety, as attackers could manipulate equipment remotely.

Key Takeaways

  • Affected Systems: Tycon Systems TPDIN-Monitor-WEB2 version 2.3.9
  • Action Required: Users should contact Tycon Systems for updates and apply any available patches.
  • Timeline: Disclosed on 2026-07-21

Original Article Summary

View CSAF Summary Successful exploitation of these vulnerabilities could result in an attacker accessing sensitive credentials, disrupting connected infrastructure, or manipulating physical equipment, which could present a physical safety risk. The following versions of Tycon Systems TPDIN-Monitor-WEB2 are affected: TPDIN-Monitor-WEB2 2.3.9 CVSS Vendor Equipment Vulnerabilities v3 9.8 Tycon Systems Tycon Systems TPDIN-Monitor-WEB2 Authentication Bypass Using an Alternate Path or Channel, Cleartext Storage of Sensitive Information Background Critical Infrastructure Sectors: Critical Manufacturing Countries/Areas Deployed: Worldwide Company Headquarters Location: United States Vulnerabilities Expand All + CVE-2026-61884 The web management interface of the affected device does not perform server-side validation of credentials during the login process. By submitting empty values for both credential fields, an unauthenticated remote attacker can bypass the authentication check and establish a valid administrative session. This grants full access to device controls including power relay management, device reboot, remote access service configuration, and network settings, which could allow an attacker to disrupt connected infrastructure or cause physical damage to equipment. View CVE Details Affected Products Tycon Systems TPDIN-Monitor-WEB2 Vendor: Tycon Systems Product Version: Tycon Systems TPDIN-Monitor-WEB2: 2.3.9 Product Status: known_affected Remediations Vendor fix Tycon Systems did not respond to CISA's attempts at coordination. Users of Tycon Systems TPDIN-Monitor-WEB2 are encouraged to contact Tycon Systems and keep their systems up to date. https://www.tyconsystems.com/contact Relevant CWE: CWE-288 Authentication Bypass Using an Alternate Path or Channel Metrics CVSS Version Base Score Base Severity Vector String 3.1 9.8 CRITICAL CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H 4.0 9.3 CRITICAL CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N CVE-2026-55985 The device's web management interface stores and displays system credentials in cleartext on a certain configuration page accessible to authenticated users. Any party with access to the administrative dashboard can immediately read these credentials, which may be used to compromise other systems on the local network. View CVE Details Affected Products Tycon Systems TPDIN-Monitor-WEB2 Vendor: Tycon Systems Product Version: Tycon Systems TPDIN-Monitor-WEB2: 2.3.9 Product Status: known_affected Remediations Vendor fix Tycon Systems did not respond to CISA's attempts at coordination. Users of Tycon Systems TPDIN-Monitor-WEB2 are encouraged to contact Tycon Systems and keep their systems up to date. https://www.tyconsystems.com/contact Relevant CWE: CWE-312 Cleartext Storage of Sensitive Information Metrics CVSS Version Base Score Base Severity Vector String 3.1 4.3 MEDIUM CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N 4.0 5.3 MEDIUM CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N Acknowledgments Abdiwelli Guled reported these vulnerabilities to CISA Legal Notice and Terms of Use This product is provided subject to this Notification (https://www.cisa.gov/notification) and this Privacy & Use policy (https://www.cisa.gov/privacy-policy). Recommended Practices CISA recommends users take defensive measures to minimize the risk of exploitation of these vulnerabilities. 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 these vulnerabilities has been reported to CISA at this time. Revision History Initial Release Date: 2026-07-21 Date Revision Summary 2026-07-21 1 Initial Publication Legal Notice and Terms of Use

Impact

Tycon Systems TPDIN-Monitor-WEB2 version 2.3.9

Exploitation Status

No active exploitation has been reported at this time. However, organizations should still apply patches promptly as proof-of-concept code may exist.

Timeline

Disclosed on 2026-07-21

Remediation

Users should contact Tycon Systems for updates and apply any available patches. It is recommended to minimize network exposure for control system devices, locate them behind firewalls, and use secure remote access methods such as VPNs.

Additional Information

This threat intelligence is aggregated from trusted cybersecurity sources. For the most up-to-date information, technical details, and official vendor guidance, please refer to the original article linked below.

Related Topics: This incident relates to CVE, Critical.

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