EUVD-2026-73024
GHSA-9c9j-mggh-28xf
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
IKE is a pre-authentication network protocol on UDP 500/4500; no credentials needed; crash yields availability loss only.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
3DescriptionCVE.org
Null pointer dereference in Windows IKE Extension allows an unauthorized attacker to deny service over a network.
AnalysisAI
Null pointer dereference in the Windows Internet Key Exchange (IKE) Extension allows unauthenticated remote attackers to crash the IKE service and deny VPN/IPsec negotiation to legitimate users. Affected systems span Windows Server 2022, Windows Server 2025, and Windows 11 versions 23H2 through 26H1. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The IKE Extension service must be active and reachable - this is the case on any Windows system configured as a VPN server, DirectAccess endpoint, or IPsec gateway with UDP port 500 and/or 4500 accessible from the attacker. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 7.5 vector (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H) accurately reflects that IKE is a pre-authentication protocol reachable over the network, so no credentials are needed to trigger the crash. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | The primary fix is to apply the Microsoft-released security update through Windows Update, Windows Server Update Services (WSUS), or Microsoft Update Catalog, targeting the build numbers specified above for each affected Windows version. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify all Windows Server 2022, Windows Server 2025, and Windows 11 (versions 23H2-26H1) systems configured for VPN or IPsec using your asset inventory tools. …
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Same weakness CWE-476 – NULL Pointer Dereference
View allSame technique Denial Of Service
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External POC / Exploit Code
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