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CVE-2026-33824

Microsoft Internet Key Exchange (IKE) Service Extensions Double Free Vulnerability

Published Apr 14, 2026Sources checked Sep 27, 2026
9.8CRITICALCVSS out of 10
What this means

Actively exploited

CISA lists CVE-2026-33824 in its Known Exploited Vulnerabilities catalog, which means exploitation has been observed. The entry applies to Microsoft Internet Key Exchange (IKE) Service Extensions.

  • 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.
CISA KEVListedObserved exploitation
EPSS1.6%Estimated 30-day exploitation probability
Ransomware useNot markedCISA KEV ransomware field
Threat actors1Source-linked actor relationships
Overview

What is CVE-2026-33824?

Double free in Windows IKE Extension allows an unauthorized attacker to execute code over a network.