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Iranian-Affiliated Cyber Actors Exploit Programmable Logic Controllers Across US Critical Infrastructure ↗ source

April 7, 2026 NSA Advisory
Co-sealed by: CISA, CNMF, DOE, EPA, FBI, NIST, NSA

Summary

control and data acquisition (SCADA) displays, resulting in operational disruption and financial loss. U.S. organizations should urgently review the tactics, techniques, and procedures (TTPs) and indicators of compromise (IOCs) in this advisory for indications of current or historical activity on their networks, and apply the recommendations listed in the Mitigations section of this advisory to reduce the risk of compromise.  Rockwell Automation/Allen-Bradley manufactured PLCs Affected Products  Potentially other branded PLCs  Remove PLCs from direct internet exposure via secure gateway and firewall.  Query available logs for the provided IOCs in the corresponding time frames.  Check available logs for suspicious traffic on the ports associated with OT devices, including 44818, 2222, 102, and 502, especially traffic originating

News Coverage

No coverage found in monitored research blogs or news feeds.

CVEs Referenced in This Publication

CVECVSSAffected
CVE-2021-22681 9.8 Critical Rockwell Multiple Products Multiple Rockwell products contain an insufficient protected credentials vulnerability. Studio 5000 Logix Designer software may allow a key to be dis…

Extracted from the publication text. Each CVE links to its tracked detail page.

Vendors Named in This Publication

Each vendor links to its Known Exploited Vulnerabilities catalog page. Only vendors that appear in the KEV catalog are listed, either because the publication cites one of their KEV entries or because it names them directly.