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Actively exploitedCVSS 9.8 · CRITICAL

CVE-2026-33824Remote Code Execution in Windows IKE Extension

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

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Analysis

Esta vulnerabilidad en las extensiones del servicio IKE de Windows permite que un atacante remoto ejecute código de forma arbitraria a través de la red. El fallo está siendo explotado activamente en el mundo real y afecta a infraestructuras basadas en Windows 10 y 11. Se recomienda parchar de inmediato para evitar el compromiso total del sistema.

Relevant roles

WindowsCyberSecurityBackendCloud

Severity

Score: 9.8(CRITICAL)
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
AV: NETWORK
AC: LOW
PR: NONE
UI: NONE
S: UNCHANGED
C: HIGH
I: HIGH
A: HIGH
Weakness (CWE): CWE-415

CISA KEV

Added to KEV: 2026-08-18
Federal patch deadline: 2026-08-21
Known ransomware use: Unknown
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.

EPSS

Probability of exploitation (next 30 days): 0.5585 (55.9%)
Percentile: 99.0%
EPSS: 2026-08-18

Affects

microsoft:windows_10_1607microsoft:windows_10_1809microsoft:windows_10_21h2microsoft:windows_10_22h2microsoft:windows_11_23h2microsoft:windows_11_24h2microsoft:windows_11_25h2microsoft:windows_11_26h1microsoft:windows_server_2016microsoft:windows_server_2019microsoft:windows_server_2022microsoft:windows_server_2022_23h2microsoft:windows_server_2025

Technical description

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

Published: 4/14/2026, 6:17:34 PM
Last modified: 8/18/2026, 7:35:52 PM

References

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