CISA and Partners Release Fact Sheet on Securing Automatic Tank Gauge Systems

06/02/2026 2:30 PM EDT

Today, CISA and federal partners released the fact sheet CISA and Partners Urge Hardening Automatic Tank Gauge Systems in response to malicious cyber activity targeting U.S. automatic tank gauge (ATG) systems, which are widely used across critical infrastructure sectors.

The recent malicious cyber activity observed by the authoring organizations—which the U.S. government has not yet attributed to a nation-state or threat actor group—involves cyber threat actors compromising internet-exposed ATG systems and subsequently modifying them through command execution. This fact sheet provides insight into probable tactics, techniques, and procedures (TTPs) leveraged by these cyber actors, highlights risk factors associated with such compromises, and provides mitigation guidance and resources to reduce the likelihood of continued malicious activity targeting U.S.-based ATG systems.

Recommended Actions:

• Remove ATG systems from public internet exposure
• Enforce strong, unique passwords and multifactor authentication
• Apply vendor patches and update software
• Monitor for unauthorized access and suspicious activity

For more information, review the full fact sheet. Report suspicious activity to CISA’s Operations Center (report@cisa.gov or 888-282-0870) and the FBI’s IC3 (www.ic3.gov).