EUVD-2026-73483
GHSA-h6vx-fw42-ppfg
Severity by source
AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Network-delivered media file triggers heap overflow with no auth required; single user-open interaction (UI:R) is the only barrier; full C/I/A impact consistent with process-level RCE.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
3DescriptionCVE.org
Heap-based buffer overflow in Microsoft Windows Media Foundation allows an unauthorized attacker to execute code over a network.
AnalysisAI
Heap-based buffer overflow in Windows Media Foundation enables remote code execution across a wide range of Windows 10, Windows 11, and Windows Server releases. An unauthenticated network attacker can trigger the overflow by inducing a target user to open or process a crafted media file, resulting in full compromise of confidentiality, integrity, and availability at the process level. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires that the target user open, preview, or otherwise trigger processing of a specially crafted media file - this is the sole prerequisite encoded in the CVSS UI:R metric. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 vector AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H scores 8.8, reflecting a high-confidence RCE path that requires only a single user interaction - opening a maliciously crafted media file. … 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 | Apply the Microsoft security update for the relevant Windows version through Windows Update or WSUS, targeting the build numbers listed above as the minimum patched versions. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: conduct an inventory of Windows 10, Windows 11, and Windows Server systems in your environment to establish total scope of exposure. …
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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
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