# CISA Alerts on Cyber Threats to U.S. Water Infrastructure

*Published August 3, 2026*
*Source: [https://www.bleepingcomputer.com/news/security/cisa-warns-of-cyberattacks-disrupting-us-water-utilities/](https://www.bleepingcomputer.com/news/security/cisa-warns-of-cyberattacks-disrupting-us-water-utilities/)*

## Executive Summary

CISA has issued a warning about increasing cyberattacks on internet-exposed PLCs in the U.S. water sector, urging removal of public exposure to prevent disruptions. This is crucial for safeguarding water supply and public health.

## Article

The Cybersecurity and Infrastructure Security Agency (CISA) has raised an alarm over increasing cyberattacks targeting programmable logic controllers (PLCs) within the water and wastewater sector in the United States. These attacks exploit vulnerabilities in internet-exposed PLCs, which are critical components for managing and controlling water treatment processes. When these systems are compromised, it can lead to significant disruptions in water supply and safety, posing a risk to public health and security.

CISA has identified that many of these attacks occur because PLCs and other critical infrastructure components are accessible over the internet, making them susceptible to unauthorized access and manipulation. The agency strongly advises that organizations immediately assess and mitigate these vulnerabilities by removing PLCs from public exposure. This move would significantly reduce the risk of unauthorized intrusion and potential system disruptions.

The impact of these cyber threats is substantial, affecting both the functionality of water utilities and the communities they serve. With water being a vital resource, any disruption can have serious consequences for residential, commercial, and industrial users alike. Therefore, securing these systems is not just a technical necessity but a critical measure for ensuring public safety.

Organizations in the water and wastewater sector are urged to take proactive measures to safeguard their infrastructure. By doing so, they can prevent potential disruptions and maintain the integrity of their services.