CVE WatchAug 19, 2026

CVE-2026-33824

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

CVSS

9.8

Critical

EPSS

72.7%

p99

KEV

YES

Aug 18, 2026

Exploit Today

0-100

Published: Apr 14, 2026 · Last modified: Aug 19, 2026 · CWE-415

EPSS · 30d

55.9%EPSS · 30 days77.9%

2026-08-022026-08-30

KEV catalog record

Product

Microsoft / Internet Key Exchange (IKE) Service Extensions

Vulnerability

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

Added to KEV

Aug 18, 2026

Remediate by

Aug 21, 2026

Known ransomware use

Summary description

Microsoft Internet Key Exchange (IKE) Service Extensions contains a double free vulnerability that could enable remote code execution.

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.

Notes

https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2026-33824 ; BOD 26-04: https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk ; Forensics Triage Requirements: https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk ; https://nvd.nist.gov/vuln/detail/CVE-2026-33824

Technical description

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

Official references

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