Hello. Employees at Stryker locations around the world woke up on Wednesday to find their cellphones and laptops were disabled by a major cyberattack against the medical devices company.

The hackers who claimed to be behind the digital assault said they were retaliating on behalf of Iran.

Stryker, which makes robotic surgery systems and other medical products, told its roughly 56,000 employees to disconnect from all networks and avoid turning on company-issued devices, citing "a severe, global disruption across the Windows environment." Read our full story. 

Also today: 

• Senators call to assess AI's power and geopolitical implications
• Tire maker Michelin was hit in Oracle hack
• Salesforce customers battle another exploitation campaign 
• Watch: Former CISA director Jen Easterly speaks out on Iran, China, AI
• Meta promises more parental controls for WhatsApp
• And more

• Significant questions loom about the power of the AI and how it should be deployed, said Sen. Mark Warner (D., Va.), a co-sponsor of the bill with Sen. Mike Rounds (R., S.D.). Read our full story.

Salesforce notified customers of a hacking campaign targeting Experience Cloud systems with loose "guest user" settings. Google's Mandiant cyber unit is working with Salesforce and customers to close gaps. ShinyHunters claimed responsibility for these breaches. (Cyberscoop)

Another victim of Oracle hack: Global tire company Michelin said it, like dozens of other organizations, was compromised in a widespread cyberattack on the Oracle E-Business Suite enterprise software that began last July. A small amount of data was exposed and none was sensitive, Michelin said. (SecurityWeek)

• Further reading from WSJ Pro: Oracle Hack Still Generating Ransom Demands

Government officials, military members and other high-profile leaders in Portugal are being targeted by digital spies trying to break into their WhatsApp and Signal accounts, the country's top national intelligence agency said Wednesday. (Reuters)

Meta Platforms’ WhatsApp said it would roll out parent-managed accounts for preteens with new controls for messaging and calling. Parents will be able to control who can contact the account and which groups they are able to join. (WSJ)

The WSJ Pro Cybersecurity team is Deputy Bureau Chief Kim S. Nash and reporters Angus Loten and James Rundle. Follow us on X @WSJCyber. Reach the team by replying to any newsletter you receive or by emailing Kim at kim.nash@wsj.com.