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CVE-2026-83868 Microsoft CVE debrief

A race condition vulnerability in the Microsoft Bluetooth Driver could allow an authorized attacker to elevate privileges locally. Multiple Windows versions and configurations are affected, including Windows 10, Windows 11, and Windows Server. Microsoft has released a patch for this vulnerability. The vulnerability, known as CVE-2026-83868, affects various Windows versions, including Windows 10 Version 1809, Windows 10 Version 21H2, Windows 11 version 23H2, and Windows Server 2019, 2022, 2025. System administrators and security teams should assess exposure, especially for systems with Bluetooth functionality exposed, and apply patches immediately. Verification of system patches is

Vendor
Microsoft
Product
Windows 10 Version 1809
CVSS
HIGH 7
CISA KEV
Not listed in stored evidence
Original CVE published
2026-10-13
Original CVE updated
2026-10-13
Advisory published
2026-10-13
Advisory updated
2026-10-13

Who should care

System administrators and security teams for Windows-based systems, especially those with Bluetooth functionality exposed, should assess exposure and apply patches. This includes teams managing Windows 10, Windows 11, and Windows Server environments.

Why it matters

CVE-2026-83868 is a race condition vulnerability in the Microsoft Bluetooth Driver that could allow an authorized attacker to elevate privileges locally. Affected systems include various Windows 10, Windows 11, and Windows Server versions. Microsoft has released patches for this vulnerability. System administrators and security teams should assess exposure, especially for systems with Bluetooth functionality exposed, and apply patches immediately. Verification of system configurations and inventory checks are necessary to ensure protection.

  • Local privilege escalation could lead to increased control over affected systems.
  • Successful exploitation requires local access and authorization.
  • Patch application is crucial to prevent potential system compromise.
  • Verification of system configurations and inventory checks are necessary.

Technical summary

The Microsoft Bluetooth Driver has a race condition vulnerability that could allow an authorized attacker to elevate privileges locally. This affects various Windows versions, including Windows 10 Version 1809, Windows 10 Version 21H2, Windows 11 version 23H2, and Windows Server 2019, 2022, 2025. Microsoft has released patches for these versions.

Defensive priority

Apply patches immediately for affected Windows versions, especially on systems with Bluetooth functionality exposed.

Recommended defensive actions

  • Apply patches for affected Windows 10, Windows 11, and Windows Server versions.
  • Verify and apply patches for Windows Server 2019, 2022, and 2025.
  • Review system configurations for Bluetooth exposure, especially on local networks.

Evidence notes

The CVE Program and NVD provide official records of this vulnerability. Microsoft's advisory confirms the patch. Affected versions and configurations are detailed in the CVE and NVD records.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-83868 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-83868

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-83868 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-83868

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.