Latest cybersecurity reporting from selected sources.

CISA: Iran-Linked Groups Actively Exploiting OT Exposure Risks, PLC ProgrammersFederal agencies are warning that Iranian-linked actors have begun actively exploiting internet-facing PLCs and misconfigured OT systems across U.S. critical infrastructure, enabling network access, lateral movement and potential disruption amid rising geopolitical tensions.

Device Maker Is Still Investigating March 11 Attack Claimed by Iranian HacktivistsMedical tech maker Stryker said it has restored its systems and is operational across its global manufacturing network three weeks after a wiper attack by Iranian hacktivist group Handala led to a worldwide outage at the company. The firm is continuing to investigate the incident.

Medtech Maker Is Still Recovering While Iranian Hackers Threaten More Attack VictimsAs medtech maker Stryker continues working to restore global IT systems brought offline by a cyberattack last week, class action lawsuits against the company are piling up in federal court and the Iranian hackers claiming credit for the attack are warning of more assaults to come on other victims.

Medical Device Manufacturer Hack Was Likely OpportunisticAn Iranian cyberattack on medical device maker Stryker's internal IT environment does not appear to affect connected products used by the company's healthcare clients. But an outage of Stryker's electronic ordering system could lead to supply chain issues for its customers.

Also: Anthropic Claude Code Security Impact on AppSec, RSAC Conference PreviewIn this week's panel, four ISMG editors discuss the potential cyber spillover from escalating tensions in the Iran-Israel-U.S. conflict, the market disruption sparked by Anthropic's Claude Code Security launch and a preview of RSAC Conference 2026.

Iranian Officials Call Internet Outages Intentional to Disrupt Israeli OperationsIranian officials said widespread internet outages were deliberate and meant to disrupt covert Israeli operations within the country following days of missile attacks from Israel and a rapidly escalating regional conflict that experts warn could trigger major cyberattacks on critical infrastructure.

Disruption of Country's Biggest Bank Comes as Israel-Iran War IntensifiesA pro-Israel hacking group claims to have disrupted a major Iranian bank as hostilities between the two countries raged into their fifth day. Hacking group Gonjeshke said Tuesday morning it "conducted cyberattacks which destroyed the data of the Islamic Revolutionary Guard Corps' Bank Sepah."