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CVE-2026-83832 Microsoft CVE debrief

A Windows Spaceport.sys Elevation of Privilege Vulnerability exists due to an out-of-bounds read in Windows Spaceport.sys, allowing an authorized attacker to elevate privileges locally. This vulnerability affects multiple versions of Windows 10, Windows 11, and Windows Server. The vulnerability has a high CVSS score, indicating high severity. Defenders responsible for Windows systems, especially those with high privilege escalation risk, should assess exposure and prioritize patching. The CVE Program and NVD provide official records of this vulnerability. Microsoft has released a patch for this vulnerability.

Vendor
Microsoft
Product
Windows 10 Version 1809
CVSS
HIGH 7.8
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 responsible for Windows systems, especially those with high privilege escalation risk, should assess exposure and prioritize patching.

Why it matters

CVE-2026-83832 is a high-severity elevation of privilege vulnerability in Windows Spaceport.sys. Defenders should prioritize patching, especially for systems with high privilege escalation risk.

  • Potential privilege escalation
  • Local attack vector requires local access
  • High CVSS score indicates high severity

Technical summary

An out-of-bounds read in Windows Spaceport.sys allows an authorized attacker to elevate privileges locally. Affected products include 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 2019, Windows Server 2019 (Server Core installation), Windows Server 2022, Windows Server 2025, and Windows Server 2025 (Server Core installation).

Defensive priority

Defenders should prioritize patching this vulnerability, especially for systems with high privilege escalation risk.

Recommended defensive actions

  • Patch affected Windows systems
  • Verify system configurations and inventory
  • Monitor for potential privilege escalation attempts

Evidence notes

The CVE Program and NVD provide official records of this vulnerability. Microsoft has released a patch for this vulnerability. The vulnerability has been publicly disclosed and is considered high-severity. Defenders should verify system configurations and inventory, and monitor for potential privilege escalation attempts. The official CVE record and NVD vulnerability detail provide additional information on the vulnerability.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-83832 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-83832

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

  • CVE-2026-83832 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-83832

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

Supplemental references

  • Windows Spaceport.sys Elevation of Privilege Vulnerability

    Unverified legacy reference

    URL: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/83xxx/CVE-2026-83832.json

    cve_program_cvelist_v5

  • Source reference

    Unverified legacy reference

    URL: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-83832

    Supplemental source - vendor-advisory, patch

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.