EUVD-2026-35587
GHSA-3c3c-r5gv-pf8w
Severity by source
AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
3DescriptionCVE.org
Heap-based buffer overflow in Windows Media allows an unauthorized attacker to execute code locally.
AnalysisAI
Local code execution in Microsoft Windows Media is possible through a heap-based buffer overflow that triggers when a user opens or processes a crafted media file. The flaw (CWE-122) carries a CVSS 7.8 with local attack vector and user interaction required, and no public exploit identified at time of analysis. Successful exploitation yields high impact to confidentiality, integrity, and availability within the user's security context.
Technical ContextAI
The vulnerability resides in the Windows Media component, a Microsoft-developed media handling subsystem that parses and renders audio/video content for Windows applications. CWE-122 (Heap-Based Buffer Overflow) indicates that during parsing of attacker-controlled media data, the component writes beyond the bounds of a heap-allocated buffer - typically due to missing or incorrect length validation against attacker-supplied field sizes. Heap corruption of this type is commonly leveraged to overwrite adjacent allocator metadata or object vtables to redirect control flow. Specific affected CPEs are not enumerated in the provided data; only the MSRC advisory entry is referenced.
RemediationAI
Apply the Microsoft security update referenced in the MSRC advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-48574 as soon as it is released to your servicing channel; exact fixed build numbers must be obtained from that advisory as they are not included in the provided data (patch available per vendor advisory). Until patched, compensating controls include blocking inbound delivery of high-risk media file types at email and web gateways, configuring Attack Surface Reduction rules to limit Office and browser child-process spawning of media handlers, and instructing users not to open media files from untrusted sources - note that ASR rules can break legitimate workflows that embed media in documents, and gateway blocking may disrupt business communications that include video attachments.
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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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