EUVD-2026-43784
GHSA-2hrf-rjx4-42g9
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Local vector and low privilege align with 'authorized local attacker' in the description; C:H reflects meaningful disclosure while I:N and A:N match the pure information disclosure nature with no modification or disruption of service.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Lifecycle Timeline
2DescriptionCVE.org
Exposure of sensitive information to an unauthorized actor in Windows Audio Service allows an authorized attacker to disclose information locally.
AnalysisAI
Windows Audio Service on multiple Windows desktop and server versions improperly exposes sensitive information to locally authenticated standard users, enabling information disclosure without requiring elevated privileges. Affecting Windows 10 1809 through Windows 11 26H1 and Windows Server 2019 (with Server 2022 and 2025 referenced in tags), the flaw is exploitable post-foothold by any low-privileged local account, making it a realistic post-exploitation pivot rather than an initial access vector. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The CVE description explicitly states exploitation requires 'an authorized attacker' acting 'locally,' confirmed by the CVSS vector (AV:L/PR:L/UI:N): the attacker must have an existing authenticated session on the target system with at least standard user-level (low) privileges - unauthenticated or remote exploitation is not possible. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS medium score of 5.5 accurately reflects a constrained threat model: the local attack vector (AV:L) and low-privilege requirement (PR:L) mean an attacker must already possess an authenticated foothold on the target machine, substantially limiting the attacker population and eliminating remote exploitation paths. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker who has obtained a low-privileged local user account on a target Windows system - through credential theft, phishing, or a prior vulnerability - queries or interacts with the Windows Audio Service in a manner that returns data outside the caller's authorization boundary, potentially exposing session tokens, internal service state, or other sensitive information held by the service. This disclosed data could then be leveraged to escalate privileges or pivot laterally within the environment. … |
| Remediation | Apply the vendor-released patch available through the Microsoft Security Update Guide at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-34328. … Detailed patch versions, workarounds, and compensating controls in full report. |
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External POC / Exploit Code
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