Censys finds 5,219 devices exposed to attacks by Iranian APTs, majority in U.S.
Censys researchers found 5,219 exposed Rockwell PLCs online, mostly in the U.S., urging defenders to secure or disconnect them. On April 7, 2026, U.S. agencies, including FBI, CISA, and NSA, warned of Iran-linked APTs exploiting internet-exposed Rockwell Automation PLCs. Threat actors are carrying out cyberattacks targeting internet-connected operational technology (OT) across multiple critical infrastructure sectors. […]

On April 7, 2026, U.S. agencies, including FBI, CISA, and NSA, warned of Iran-linked APTs exploiting internet-exposed Rockwell Automation PLCs.
Threat actors are carrying out cyberattacks targeting internet-connected operational technology (OT) across multiple critical infrastructure sectors. Iran-linked actors are believed to be behind the activity, aiming to cause disruption in areas such as government services, water systems, and energy.
Related breach coverage
- U.S. agencies alert: Iran-linked actors target critical infrastructure PLCs2026-04-08
U.S. agencies warn Iran-linked threat actors are targeting internet-exposed PLCs used in critical infrastructure networks. U.S. agencies, including the FBI and CISA, warn that Iran-linked hackers are targeting internet-exposed Rockwell/Allen-Bradley PLCs used in critical infrastructure. The agencies published a joint advisory involving multiple federal organizations. “Iran-affiliated advanced persistent threat (APT) actors are conducting exploitation activity […]
- Iran-Linked Hackers Disrupt US Critical Infrastructure via PLC Attacks2026-04-08
Federal agencies warn attackers are manipulating PLC and SCADA systems across multiple sectors, triggering operational disruptions and raising concerns over broader OT targeting. The post Iran-Linked Hackers Disrupt US Critical Infrastructure via PLC Attacks appeared first on SecurityWeek.
- EU sanctions Chinese and Iranian actors over cyberattacks on critical infrastructure2026-03-17
EU sanctions Chinese and Iranian firms and individuals for cyberattacks targeting critical infrastructure and over 65,000 devices across member states. The Council of the European Union has imposed sanctions on three companies and two individuals linked to cyberattacks against EU countries and partners. “The Council adopted today restrictive measures against three entities and two individuals responsible for cyber-attacks carried […]
- Iran-linked MuddyWater deploys Dindoor malware against U.S. organizations2026-03-06
Iran-linked APT MuddyWater targeted U.S. organizations, deploying the new Dindoor backdoor across sectors including banks, airports, and nonprofits. Broadcom’s Symantec Threat Hunter Team uncovered a campaign by the Iran-linked MuddyWater (aka SeedWorm, TEMP.Zagros, Mango Sandstorm, TA450, and Static Kitten) APT group targeting several U.S. organizations. “Activity associated with Iranian APT group Seedworm has been spotted on the networks of multiple […]
