EUVD-2026-44242
GHSA-p6h4-4rmr-4h27
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Pre-auth network-facing RDP gives AV:N/PR:N/UI:N with full C/I/A impact, but reliably weaponizing an uninitialized-resource memory bug typically needs favorable conditions, so AC:H.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Lifecycle Timeline
2DescriptionCVE.org
Use of uninitialized resource in Windows RDP allows an unauthorized attacker to execute code over a network.
AnalysisAI
Remote code execution in Microsoft Windows Remote Desktop (RDP) allows an unauthorized network attacker to run arbitrary code by triggering the use of an uninitialized resource (CWE-908). All currently supported Windows client and server releases are affected, from Windows 10 1607 and Windows Server 2012 through Windows 11 26H1 and Windows Server 2025. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Requires network reachability to the Windows Remote Desktop service (typically TCP/UDP 3389) on an affected Windows 10/11 or Windows Server 2012-2025 host; the CVSS vector (AV:N/AC:L/PR:N/UI:N) indicates no authentication and no user interaction are needed against a listening RDP endpoint. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The signals point to a genuine high priority for internet- or LAN-exposed RDP: CVSS 3.1 is 9.8 with AV:N/AC:L/PR:N/UI:N and full C/I/A impact, meaning a remote, unauthenticated attacker needs no user interaction. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker locates a Windows host with RDP exposed to the network and sends specially crafted protocol traffic to 3389 that drives the RDP service to consume an uninitialized memory resource, corrupting execution state to run attacker-controlled code without any credentials or user interaction. Given AV:N/AC:L/PR:N/UI:N, a successful exploit yields code execution in the RDP service context, but no public proof-of-concept has been identified at time of analysis, so weaponization difficulty is unconfirmed. |
| Remediation | Patch available per vendor advisory - apply the Microsoft security update for your specific Windows edition as documented at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-56190, which lists the per-build KB packages (exact fixed versions were not provided in this dataset and should be taken from the advisory rather than assumed). … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify and prioritize patching systems with network-exposed RDP services, beginning with domain controllers, critical infrastructure, and externally-facing servers. …
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Same weakness CWE-908 – Use of Uninitialized Resource
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External POC / Exploit Code
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