Dover Fueling Solutions ProGauge MagLink LX4 Devices
1. EXECUTIVE SUMMARY
- CVSS v4 9.3
- ATTENTION: Exploitable remotely/Low attack complexity
- Vendor: Dover Fueling Solutions
- Equipment: ProGauge MagLink LX4, ProGauge MagLink LX4 Plus, ProGauge MagLink LX4 Ultimate
- Vulnerabilities: Integer Overflow or Wraparound, Use of Hard-coded Cryptographic Key, Use of Weak Credentials
2. RISK EVALUATION
Successful exploitation of these vulnerabilities could result in a remote attacker causing a denial-of-service condition or gaining administrative access to the device.
3. TECHNICAL DETAILS
3.1 AFFECTED PRODUCTS
The following versions of ProGauge MagLink LX, a fuel and water tank monitor, are affected:
- ProGauge MagLink LX 4: Versions prior to 4.20.3
- ProGauge MagLink LX Plus: Versions prior to 4.20.3
- ProGauge MagLink LX Ultimate: Versions prior to 5.20.3
3.2 VULNERABILITY OVERVIEW
3.2.1 INTEGER OVERFLOW OR WRAPAROUND CWE-190
Affected devices fail to handle Unix time values beyond a certain point. An attacker can manually change the system time to exploit this limitation, potentially causing errors in authentication and leading to a denial-of-service condition.
CVE-2025-55068 has been assigned to this vulnerability. A CVSS v3 base score of 8.2 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H).
A CVSS v4 score has also been calculated for CVE-2025-55068. A base score of 8.8 has been calculated; the CVSS vector string is (AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N).
3.2.2 USE OF HARD-CODED CRYPTOGRAPHIC KEY CWE-321
The secret used for validating authentication tokens is hardcoded in device firmware for affected versions. An attacker who obtains the signing key can bypass authentication, gaining complete access to the system.
CVE-2025-54807 has been assigned to this vulnerability. A CVSS v3 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-2025-54807. 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).
3.2.3 USE OF WEAK CREDENTIALS CWE-1391
Affected versions of the device have default root credentials that cannot be changed through standard administrative means. An attacker with network access to the device can gain administrative access to the system.
CVE-2025-30519 has been assigned to this vulnerability. A CVSS v3 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-2025-30519. 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: Transportation Systems
- COUNTRIES/AREAS DEPLOYED: Worldwide
- COMPANY HEADQUARTERS LOCATION: United States
3.4 RESEARCHER
Pedro Umbelino of Bitsight TRACE reported these vulnerabilities to CISA.
4. MITIGATIONS
Dover Fueling Solutions recommends users update their ProGauge MagLink devices to Version 4.20.3 or later for MagLink LX 4 and MagLink LX Plus models. The upgrade can be downloaded from the Dover Fueling Solutions website.
For MagLink LX Ultimate devices, Dover Fueling Solutions recommends users update to version 5.20.3 or later.
Dover Fueling Solutions recommends all users install the software behind a firewall to minimize risk of remote attacks.
CISA recommends users take defensive measures to minimize the risk of exploitation of these vulnerabilities, 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 these vulnerabilities has been reported to CISA at this time.
5. UPDATE HISTORY
- September 18, 2025: Initial Publication
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