Actively exploited in the wild
Microsoft Internet Key Exchange (IKE) Service Extensions Double Free Vulnerability
Microsoft - Internet Key Exchange (IKE) Service Extensions · Listed in the CISA KEV since 2026-08-18. This indicates confirmed attacks in production environments.
Required action: Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
CVE-2026-33824
CriticalCVSS 9.8KEVExploitation Probability (EPSS)
Very high risk100th percentile - higher than 100% of all known CVEs
Summary
Double free in Windows IKE Extension allows an unauthorized attacker to execute code over a network.
Risk Assessment
An attacker can remotely execute code on a vulnerable Windows system, potentially leading to full machine compromise and lateral movement.
Recommendation
Install the latest Windows security updates available via Windows Update.
Original NVD description (English source)
Double free in Windows IKE Extension allows an unauthorized attacker to execute code over a network.