Severity by source
AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Local file-parsing overflow needs no privileges (PR:N) but requires the victim to open a file (UI:R, AV:L); memory-corruption code execution yields high C/I/A within the user's context (S:U).
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Lifecycle Timeline
2DescriptionCVE.org
Heap-based buffer overflow in Windows Media allows an unauthorized attacker to execute code locally.
AnalysisAI
Local code execution in the Windows Media component of supported Windows 10, Windows 11, and Windows Server (2016 through 2025) releases lets an unauthorized attacker run arbitrary code when a victim opens a maliciously crafted media file. The flaw is a heap-based buffer overflow (CWE-122) reported by Microsoft with a vendor patch available; there is no public exploit identified at time of analysis. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires a local trigger (AV:L) and mandatory user interaction (UI:R): a user must open or preview an attacker-supplied malicious media file that is parsed by the Windows Media component. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 vector (AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H = 7.8) describes a locally-triggered, low-complexity flaw needing no privileges but requiring user interaction, with high impact to all three security properties - a classic 'open a malicious file' code-execution profile. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker crafts a malformed media file that triggers the heap overflow in the Windows Media parser and delivers it via email attachment, a web download, or a network share. When the victim opens or previews the file, attacker-controlled data corrupts the heap and executes code in the context of the current user. … |
| Remediation | Patch available per vendor advisory: apply the Microsoft security update for CVE-2026-50655 referenced at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50655, selecting the KB that matches each affected build (Windows 10 1607/1809/21H2/22H2, Windows 11 24H2/25H2/26H1, and Windows Server 2016/2019/2022/2025 including Server Core). … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all Windows 10, Windows 11, and Windows Server systems (2016-2025) to identify affected deployments and assess which systems may process media files from external sources. …
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Same weakness CWE-122 – Heap-based Buffer Overflow
View allSame technique Heap Overflow
View allShare
External POC / Exploit Code
Leaving vuln.today
EUVD-2026-44119
GHSA-7cmc-qq6p-4mv2