EUVD-2026-56593
GHSA-jwr9-q995-5384
Severity by source
AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Network-exploitable race condition in RDP client; AC:H reflects inherent timing dependency; PR:N and UI:N because client initiating connection suffices with no attacker-side privileges.
Primary rating from NVD.
CVSS VectorNVD
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Lifecycle Timeline
6DescriptionNVD
Concurrent execution using shared resource with improper synchronization ('race condition') in Remote Desktop Client allows an unauthorized attacker to execute code over a network.
AnalysisAI
Remote code execution via race condition in the Windows Remote Desktop Client enables unauthenticated network attackers to execute arbitrary code on affected systems across a broad sweep of Windows versions - from the aging Windows Server 2012 through the current Windows 11 26H1 and Windows Server 2025. The flaw (CWE-362) arises from improper synchronization of shared resources during concurrent execution within the RDP client stack, allowing an adversary who can win a precise timing window to achieve full code execution. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The vulnerable component is the Windows Remote Desktop Client (mstsc.exe or equivalent RDP client stack), meaning exploitation requires a victim system to initiate or accept an RDP client session toward an attacker-controlled server. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 8.1 score reflects genuinely severe potential impact - full confidentiality, integrity, and availability compromise - but the High Complexity (AC:H) modifier is the critical signal here, as race conditions by nature require precise timing and are not trivially or reliably reproducible. … 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 Microsoft's security update, which delivers patched builds for each affected Windows version as enumerated in the EUVD affected versions data. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all systems running Windows Remote Desktop services in your environment, prioritizing production servers, terminal servers, administrative jump boxes, and any internet-exposed systems. …
Sign in for detailed remediation steps and compensating controls.
Threat intelligence, references, and detailed analysis are available after sign-in.
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External POC / Exploit Code
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