EUVD-2026-72977
GHSA-jhm5-g95f-5x88
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Network-delivered media parsing bug yielding full RCE, but as a media-parser flaw a victim must process the crafted content, so UI:R rather than Microsoft's UI:N.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
3DescriptionCVE.org
Heap-based buffer overflow in Windows Microsoft DirectMusic allows an unauthorized attacker to execute code over a network.
AnalysisAI
Remote code execution in the Microsoft DirectMusic component of Windows (spanning Windows 10, 11 through version 26H1, and Windows Server 2012 through 2025) allows an unauthorized attacker to execute arbitrary code by triggering a heap-based buffer overflow (CWE-122). Microsoft rates it 9.8 (AV:N/AC:L/PR:N/UI:N) and has released patches; there is no public exploit identified at time of analysis and it is not listed in CISA KEV. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires the DirectMusic subsystem to parse attacker-controlled media data; the crafted content must reach a Windows system that invokes DirectMusic (an application or service using the DirectX audio stack). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 base score of 9.8 with AV:N/AC:L/PR:N/UI:N/C:H/I:H/A:H describes worst-case unauthenticated remote code execution with no user interaction. … 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 | Vendor-released patch: apply the Microsoft security update that raises each build past its fixed version listed in the MSRC advisory (https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69491) - e.g. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, audit all Windows systems to identify which are running Windows 10, Windows 11, or Windows Server 2012-2025, and begin deploying Microsoft's official patches via Windows Update or WSUS. …
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Same weakness CWE-122 – Heap-based Buffer Overflow
View allSame technique Buffer Overflow
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External POC / Exploit Code
Leaving vuln.today