EUVD-2026-44013
GHSA-4rvc-f57j-w38h
Severity by source
AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Description states local code execution by an unauthorized attacker, matching AV:L/PR:N/AC:L; heap RCE in the service yields full C:H/I:H/A:H with unchanged scope.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Lifecycle Timeline
2DescriptionCVE.org
Heap-based buffer overflow in Windows Message Queuing Queue Manager allows an unauthorized attacker to execute code locally.
AnalysisAI
Local code execution in the Microsoft Message Queuing (MSMQ) Queue Manager affects a broad range of Windows client and server releases from Windows 10 1607 and Windows Server 2012 through Windows 11 26H1 and Windows Server 2025. A heap-based buffer overflow (CWE-122) lets an attacker who can reach the local MSMQ service run arbitrary code with high confidentiality, integrity, and availability impact; the CVSS 3.1 base score is 8.4 with a local attack vector but no privileges or user interaction required. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires that the target Windows host has the optional Message Queuing (MSMQ) feature installed and the Queue Manager service running - MSMQ is not enabled by default, so this non-default configuration is the primary gating condition. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The signals are moderately elevated but not emergency-tier. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker who has gained a low-privilege local foothold on a Windows host running MSMQ (or can reach the Queue Manager through a locally accessible interface) sends a crafted, oversized message to the MSMQ Queue Manager, overflowing a heap buffer and corrupting adjacent heap structures. By grooming the heap they redirect execution and run arbitrary code in the context of the MSMQ service, escalating their control of the system. … |
| Remediation | Apply the Microsoft security update for CVE-2026-54992 - Patch available per vendor advisory; obtain the exact per-OS fixed build from the Microsoft Update Guide at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-54992 and deploy via Windows Update/WSUS/your patch pipeline to all affected Windows 10/11 and Windows Server 2012-2025 hosts (including Server Core). … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, conduct a complete inventory of Windows 10, Windows 11, and Windows Server 2012-2025 systems to identify which have MSMQ enabled. …
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Same weakness CWE-122 – Heap-based Buffer Overflow
View allSame technique Heap Overflow
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External POC / Exploit Code
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