EUVD-2026-73726
GHSA-479g-vcj5-v8cm
Severity by source
AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Network delivery requires no attacker credentials (PR:N), user must open crafted media file (UI:R), and successful exploitation yields full code execution (C/I/A:H).
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
3DescriptionCVE.org
Heap-based buffer overflow in Windows Media Player allows an unauthorized attacker to execute code over a network.
AnalysisAI
Heap-based buffer overflow in Windows Media Player enables remote code execution across a broad swath of Microsoft Windows versions, from Windows Server 2012 through Windows 11 26H1 and Windows Server 2025. The CVSS 8.8 vector (AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H) reflects network-delivered exploitation requiring a user to open a malicious media file, with full confidentiality, integrity, and availability impact upon success. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | User interaction is required - the victim must actively open or preview a malicious media file using Windows Media Player on an unpatched Windows system (UI:R from CVSS vector). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 8.8 score appropriately reflects a high-severity, user-interaction-dependent code execution path. … 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 CVE-2026-70203 via Windows Update or the Microsoft Update Catalog, targeting the following patched build thresholds: Windows 10 21H2/22H2 to 10.0.19044.7725/10.0.19045.7725 or later; Windows 11 23H2 to 10.0.22631.7582 or later; Windows 11 24H2/25H2 to 10.0.26100.9445 or later; Windows 11 26H1 to 10.0.28000.2954 or later; Windows Server 2025 to 10.0.26100.33438 or later; Windows Server 2022 to 10.0.20348.5622 or later; Windows Server 2019 to 10.0.17763.9245 or later; Windows Server 2016 to 10.0.14393.9512 or later; Windows Server 2012 R2 to 6.3.9600.23397 or later; Windows Server 2012 to 6.2.9200.26349 or later. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify all systems running affected Windows versions (Server 2012, 2016, 2019, 2022, 2025, and Windows 11 through 26H1) and assess Windows Media Player exposure; notify stakeholders and security teams of the threat vector. …
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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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