EUVD-2026-73524
GHSA-wxvp-qvh8-cvc3
Severity by source
AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Network-delivered media triggers heap overflow with no auth; UI:R for user-initiated file open; S:U as exploitation stays within the WMF process boundary.
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
Remote code execution in Windows Media Foundation exposes virtually all supported Windows releases to heap buffer overflow exploitation via network-delivered media content. The CVSS vector (AV:N/AC:L/PR:N/UI:R) indicates an unauthenticated attacker can trigger the flaw by enticing a user to open or stream a maliciously crafted media file, resulting in full confidentiality, integrity, and availability compromise of the affected process. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires that the target user open or preview a maliciously crafted media file through any application that invokes the Windows Media Foundation parsing pipeline - this includes but is not limited to browser-embedded media, Windows Media Player, and any third-party application using WMF COM APIs. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 8.8 score reflects a realistic and high-impact attack surface: network-deliverable via malicious web pages, email attachments, or shared media files, with no authentication required and only a single user action (opening media content) as a barrier. … 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 updates released for this vulnerability via Windows Update or WSUS, targeting the build thresholds listed in EUVD-2026-73524 (e.g., Windows 11 24H2 to build 10.0.26100.9445 or later, Windows 10 22H2 to 10.0.19045.7725 or later, Windows Server 2025 to 10.0.26100.33438 or later - full per-version targets in the MSRC advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69511). … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify all Windows systems in your organization running supported versions that include Windows Media Foundation and note which systems handle media files or are accessed by remote users. …
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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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