Good day. Defense Secretary Pete Hegseth blamed disgruntled Pentagon employees for leaking details of private Signal chats in which he disclosed information on sensitive military operations to his wife, brother and personal attorney.

Hegseth, who previously participated in a group chat regarding strikes in Yemen that inadvertently included a journalist, said that former employees were attempting to sabotage President Trump’s agenda. He is under investigation by the Pentagon’s inspector general over both chats.

The use of Signal to conduct official government business has come under intense scrutiny since the Atlantic first reported on the chat, which included its editor. Former national security officials have said that while the platforms are designed with security in mind, they aren’t foolproof, and should never be used to discuss confidential government matters.

Read our full story here.

Also today:

• Marks & Spencer confirms cyberattack.
• Cyber CEO charged with computer crimes.
• Baltimore agencies under cyberattack.

Two Baltimore Institutions Breached This Year. Baltimore City Schools said information belonging to employees, contractors and some students may have been affected by a February cyberattack. The Baltimore City State's Attorney's office also said that it was breached in March, in a separate incident. (Baltimore Sun)

Oklahoma Cyber CEO Charged in Malware Case. The chief executive of an Oklahoma cybersecurity company was charged with computer crimes, after being arrested for allegedly installing malware on hospital systems. The man, Jeffrey Bowie, was seen using a staff system by an employee at SSM Health’s St. Anthony Hospital in August. A forensic review later determined malware was installed, and Bowie was arrested. (Cybernews)

The WSJ Pro Cybersecurity team is Deputy Editor Kim S. Nash (on X @knash99), reporter James Rundle and reporter Catherine Stupp (@catstupp). Follow us on X @WSJCyber. Reach the team by replying to any newsletter you receive or by emailing Kim at kim.nash@wsj.com.