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CVE-2026-33824 Microsoft CVE debrief

Microsoft Internet Key Exchange (IKE) Service Extensions Double Free Vulnerability debrief. This vulnerability affects Microsoft Internet Key Exchange (IKE) Service Extensions, allowing for potential remote code execution. It is crucial for defenders and administrators to apply mitigations according to vendor instructions and ensure compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk guidance. The vulnerability has a high severity score and requires immediate attention.

Vendor
Microsoft
Product
Internet Key Exchange (IKE) Service Extensions
CVSS
CRITICAL 9.8
CISA KEV
Listed
Original CVE published
2026-08-18
Original CVE updated
2026-08-18
Advisory published
2026-08-18
Advisory updated
2026-08-18

Who should care

Defenders and administrators of Microsoft Internet Key Exchange (IKE) Service Extensions should prioritize patching and verification due to the potential for remote code execution. It is crucial to apply mitigations in accordance with vendor instructions and ensure compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk guidance.

Why it matters

This vulnerability requires immediate attention from defenders and administrators of Microsoft Internet Key Exchange (IKE) Service Extensions. The Double Free Vulnerability could lead to potential remote code execution. Therefore, it is crucial to apply mitigations in accordance with vendor instructions and ensure compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk guidance.

  • Potential for remote code execution

Technical summary

The Microsoft Internet Key Exchange (IKE) Service Extensions has a Double Free Vulnerability. This vulnerability could allow for remote code execution, making it critical for defenders and administrators to apply mitigations according to vendor instructions. The vulnerability affects Microsoft Internet Key Exchange (IKE) Service Extensions and requires immediate attention.

Defensive priority

High priority for patching and verification

Recommended defensive actions

  • Apply mitigations in accordance with vendor instructions
  • Ensure compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk guidance
  • Follow CISA’s Forensics Triage Requirements

Evidence notes

The CISA Known Exploited Vulnerabilities catalog and CVE Program record provide official details on this vulnerability. Evidence from these sources indicates that this Double Free Vulnerability in Microsoft Internet Key Exchange (IKE) Service Extensions could lead to potential remote code execution. Defenders should verify affected product deployments and apply vendor-supported updates or mitigations.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-33824 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-33824

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-33824 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-33824

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

  • CISA Known Exploited Vulnerabilities catalog

    Publisher, destination, and source semantics verified

    URL: https://www.cisa.gov/known-exploited-vulnerabilities-catalog

    Cybersecurity and Infrastructure Security Agency - Official CISA catalog of vulnerabilities known to be exploited in the wild.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.