EUVD-2026-73431
GHSA-ww2j-77c3-r2v3
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Local access with low privilege required to interact with USB audio driver; only kernel memory confidentiality is impacted - no write or availability impact applies.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
4DescriptionCVE.org
Out-of-bounds read in Windows USB Audio Class driver (usbaudio.sys) allows an authorized attacker to disclose information locally.
AnalysisAI
Out-of-bounds read in the Windows USB Audio Class driver (usbaudio.sys) allows a local low-privileged attacker to disclose kernel-mode memory contents. The vulnerability spans a wide swath of Windows releases - from Windows 10 1607 and Windows Server 2012 through Windows 11 26H1 and Windows Server 2025 - making patch surface operationally broad. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires a local interactive session or existing code execution with at least low (user-level) privileges on the target Windows system, consistent with the CVSS PR:L rating. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 medium score of 5.5 accurately characterizes the constrained threat model: the local attack vector (AV:L) and low-privilege requirement (PR:L) mean an attacker must already possess an interactive session or code execution on the target, which precludes remote or unauthenticated exploitation. … 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 for the relevant Windows versions as described in the MSRC advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69286, targeting the fixed builds enumerated in EUVD-2026-73431 (e.g., Windows Server 2025 to 10.0.26100.33438, Windows Server 2019 to 10.0.17763.9245, Windows 10 22H2 to 10.0.19045.7725, Windows 11 24H2 to 10.0.26100.9445). … Detailed patch versions, workarounds, and compensating controls in full report. |
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External POC / Exploit Code
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