CME · News · 20260806N

Cybersecurity Ransomware Campaign

CME GROUP INC. · 2026-08-06 · Importance 31 · Surprise 42

A ransomware campaign targeted CME Group and other U.S. financial and professional-services firms during the month preceding August 6, 2026. Attackers reportedly used social-engineering methods, including fake IT calls and fraudulent websites, to obtain employee credentials and authentication codes. Google reported that some affected organizations paid ransoms, while the campaign expanded toward private-equity firms, law practices, and credit-rating agencies. The reporting did not confirm a CME breach, ransom payment, operational disruption, or quantified financial impact.

Key facts

• Hackers are targeting major US financial and professional services firms, including Blackstone, CME Group, and KKR, in a ransomware campaign. source
• Google reported that some organizations have paid ransoms in connection with these attacks. source
• Attackers use social engineering tactics like fake IT calls and fraudulent websites to steal employee credentials and authentication codes. source
• Ransom-seeking hackers have targeted several prominent U.S. financial institutions and other businesses over the past month, including private equity firms like Blackstone and CME. source
• The attacks utilize phone calls to compromise victims. source