EUVD-2026-43971
GHSA-ggv4-x2vr-w9jf
Severity by source
AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Adjacent Bluetooth range gives AV:A; no auth or interaction needed (PR:N/UI:N/AC:L); kernel-mode overflow yields total compromise, so C/I/A all High.
Primary rating from Vendor (microsoft).
CVSS VectorNVD
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Lifecycle Timeline
5DescriptionNVD
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 Microsoft Windows Bluetooth Port Driver (bthport) allows an adjacent, unauthenticated attacker to run arbitrary code by triggering a heap-based buffer overflow over Bluetooth radio range. The flaw spans a wide range of Windows client and server builds, from Windows 10 1607 and Server 2012 through Windows 11 26H1 and Server 2025. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires that the target system has Bluetooth enabled and an active/reachable Bluetooth Port Driver, and that the attacker is within Bluetooth radio range (CVSS AV:A / adjacent network) - internet-based remote exploitation is not supported by the data. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | Signals here are mixed but lean toward prompt patching. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker within Bluetooth radio range of a vulnerable Windows machine sends specially crafted Bluetooth frames that overflow a heap buffer in the Bluetooth Port Driver, corrupting kernel pool memory to achieve arbitrary code execution as SYSTEM. No user interaction or authentication is required, so a target with Bluetooth enabled in a public space (conference, office, café) could be compromised silently. … |
| Remediation | Apply the Microsoft security update for CVE-2026-42975, which is available from the vendor; install the cumulative update that brings each affected build to or above its fixed revision, e.g. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Identify all systems running Windows 10 (1607 and later), Windows 11 (through 26H1), and Windows Server (2012 through 2025) in your environment using asset inventory and SCCM/Intune; confirm Microsoft patch availability for CVE-2026-42975. …
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External POC / Exploit Code
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