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CVE-2026-83827 Microsoft CVE debrief

A heap-based buffer overflow in the Windows Bluetooth Port Driver allows an authorized attacker to elevate privileges locally. Multiple Windows versions are affected, including Windows 10, Windows 11, and Windows Server. This vulnerability has a high severity and requires immediate attention from defenders and system administrators responsible for Windows systems, especially those with Bluetooth functionality exposed. The issue is supported by official CVE and NVD records, as well as Microsoft's advisory. Affected systems require verification and patching to prevent local privilege escalation.

Vendor
Microsoft
Product
Windows 10 Version 1607
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

Defenders and system administrators responsible for Windows systems, especially those with Bluetooth functionality exposed, should assess exposure and apply patches immediately.

Why it matters

CVE-2026-83827 is a high-severity elevation of privilege vulnerability in the Windows Bluetooth Port Driver. Defenders should care because it allows authorized attackers to gain local privileges, potentially leading to further exploitation. System administrators and defenders responsible for Windows systems, especially those with Bluetooth functionality exposed, should assess exposure and apply patches immediately. The vulnerability's impact is supported by official CVE and NVD records, as well as Microsoft's advisory.

  • Local privilege escalation requires immediate patching.
  • Exposure of Bluetooth functionality increases risk.
  • Affected systems require verification and patching.
  • System administrators must prioritize patching for Windows versions.

Technical summary

The Windows Bluetooth Port Driver is vulnerable to a heap-based buffer overflow, allowing an authorized attacker to elevate privileges locally. This issue affects multiple Windows versions, including Windows 10 Version 1607, Windows 10 Version 1809, Windows 10 Version 21H2, Windows 10 Version 22H2, Windows 11 version 23H2, Windows 11 Version 23H2, Windows 11 Version 24H2, Windows 11 Version 25H2, Windows 11 version 26H1, Windows 11 Version 26H2, Windows Server 2016, Windows Server 2019, Windows Server 2022, Windows Server 2025.

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 Microsoft's official patches.
  • Review system exposure, especially for systems with Bluetooth functionality.

Evidence notes

The CVE Program and NVD provide official records of the vulnerability. Microsoft has released a patch for the issue. The vulnerability affects multiple Windows versions, including Windows 10 Version 1607, Windows 10 Version 1809, Windows 10 Version 21H2, Windows 10 Version 22H2, Windows 11 version 23H2, Windows 11 Version 23H2, Windows 11 Version 24H2, Windows 11 Version 25H2, Windows 11 version 26H1, Windows 11 Version 26H2, Windows Server 2016, Windows Server 2019, Windows Server 202

Sources and references

Verified primary and authoritative sources

  • CVE-2026-83827 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-83827

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

  • CVE-2026-83827 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-83827

    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.