EUVD-2026-43971
GHSA-ggv4-x2vr-w9jf
Severity by source
AV:A/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Bluetooth-range attack (AV:A) needs no auth (PR:N) but one user action (UI:R); kernel-driver code execution yields full C/I/A impact.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Lifecycle Timeline
2DescriptionCVE.org
Heap-based buffer overflow in Windows Bluetooth Port Driver allows an unauthorized attacker to execute code over an adjacent network.
AnalysisAI
Remote code execution in the Windows Bluetooth Port Driver lets an adjacent, unauthenticated attacker corrupt heap memory to run arbitrary code on the target after minimal user interaction. The flaw (CWE-122 heap-based buffer overflow) affects a broad range of client and server SKUs from Windows 10 1607 through Windows 11 26H1 and Windows Server 2012 through 2025, with full confidentiality, integrity, and availability impact (CVSS 8.0). …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires the attacker to be within Bluetooth radio range (adjacent network, AV:A) of a target that has Bluetooth enabled and the vulnerable Port Driver active, plus one user interaction (UI:R) such as accepting a pairing request, connection, or transfer prompt. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 vector (AV:A/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H, 8.0 High) shows a low-complexity, unauthenticated attack requiring only proximity (adjacent/Bluetooth range) and one user action, yielding full compromise of the host. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker within Bluetooth range of a target laptop (for example in an office, cafe, or conference) sends crafted Bluetooth protocol data that overflows a heap buffer in the Windows Bluetooth Port Driver; when the user accepts or interacts with the resulting prompt or connection, the overflow corrupts kernel heap memory and executes attacker-controlled code with system-level privileges. No public exploit was identified at time of analysis, and the low attack complexity (AC:L) combined with the proximity and single-user-action requirements makes this a plausible targeted attack against high-value nearby devices. |
| Remediation | Apply the Microsoft security update for CVE-2026-42975 - Patch available per vendor advisory - using the exact per-SKU build listed at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42975 (no single fixed version string was provided in the input; use the MSRC Security Updates table for your specific OS version and install the corresponding cumulative update). … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all Windows systems across the organization: Windows 10 (1607 and later), Windows 11 (through 26H1), and Windows Server (2012-2025). …
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Same weakness CWE-122 – Heap-based Buffer Overflow
View allSame technique Heap Overflow
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External POC / Exploit Code
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