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CVE-2026-71348 Microsoft CVE debrief

A heap-based buffer overflow vulnerability exists in Windows Spaceport.sys, which could allow an unauthorized attacker to execute code with a physical attack. The CVE record was published on 2026-09-08T18:20:14.780Z and has not been modified since then. The NVD entry is currently Undergoing Analysis. This vulnerability affects Windows 10 Version 1607 systems, and defenders should assess exposure and potential impact. The vulnerability has a CVSS score of 6.8 and a severity of MEDIUM. The CVE Program record and NVD detail page provide information on the vulnerability.

Vendor
Microsoft
Product
Windows 10 Version 1607
CVSS
MEDIUM 6.8
CISA KEV
Not listed in stored evidence
Original CVE published
2026-09-08
Original CVE updated
2026-10-14
Advisory published
2026-09-08
Advisory updated
2026-10-14

Who should care

Defenders responsible for Windows 10 Version 1607 systems should assess exposure and potential impact due to a heap-based buffer overflow vulnerability in Windows Spaceport.sys. The vulnerability has a CVSS score of 6.8 and a severity of MEDIUM, and defenders should prioritize verifying exposure and assessing potential impact.

Why it matters

Defenders should prioritize verifying exposure and assessing potential impact on Windows 10 Version 1607 systems due to a heap-based buffer overflow vulnerability in Windows Spaceport.sys.

  • Verify exposure of Windows 10 Version 1607 systems to this vulnerability
  • Assess potential impact on Windows 10 Version 1607 systems
  • Implement recommended mitigations and patches from Microsoft

Technical summary

A heap-based buffer overflow vulnerability exists in Windows Spaceport.sys, which could allow an unauthorized attacker to execute code with a physical attack. The vulnerability affects Windows 10 Version 1607 systems and has a CVSS score of 6.8 and a severity of MEDIUM. Defenders should prioritize verifying exposure and assessing potential impact on Windows 10 Version 1607 systems.

Defensive priority

Defenders should prioritize verifying exposure and assessing potential impact on Windows 10 Version 1607 systems.

Recommended defensive actions

  • Verify exposure of Windows 10 Version 1607 systems to this vulnerability
  • Assess potential impact on Windows 10 Version 1607 systems
  • Review and implement recommended mitigations and patches from Microsoft

Evidence notes

The CVE record and NVD detail page provide information on the vulnerability, but limited details are available on affected versions and exploitation. The vulnerability is a heap-based buffer overflow in Windows Spaceport.sys, and defenders should verify exposure and assess potential impact on Windows 10 Version 1607 systems.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-71348 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-71348

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

  • CVE-2026-71348 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-71348

    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.