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Critical RCE flaw in Windows IKE Extension now actively exploited

August 19, 2026 · BleepingComputer · Severity: CRITICAL

The U.S. Cybersecurity and Infrastructure Security Agency (CISA) warned that hackers are exploiting a critical-severity remote code execution (RCE) flaw in the Windows Internet Key Exchange (IKE) Service Extensions component.

Key Takeaways

  • CISA warned that hackers are actively exploiting a critical-severity remote code execution vulnerability in Windows IKE Extensions.
  • The flaw affects the Windows Internet Key Exchange Service Extensions component used for VPN and secure communications.
  • Organizations should prioritize patching this actively exploited vulnerability in Windows environments as a top security concern.
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