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CVE-2026-72942 Microsoft CVE debrief

CVE-2026-72942 is a MEDIUM severity vulnerability in Windows Spaceport.sys that allows an unauthorized attacker to disclose information over a network. The CVE record was published on 2026-09-08T18:20:19.253Z and has not been modified since then. The NVD entry is currently Analyzed. Defenders should prioritize verifying exposure of Windows systems, especially those with internet-facing interfaces, and apply patches as available. This includes administrators of Windows 10, Windows 11, and Windows Server environments. The vulnerability is an out-of-bounds read in Windows Spaceport.sys, which could allow information disclosure over a network. Affected software configurations include

Vendor
Microsoft
Product
Windows 10 Version 1607
CVSS
MEDIUM 6.5
CISA KEV
Not listed in stored evidence
Original CVE published
2026-09-08
Original CVE updated
2026-09-21
Advisory published
2026-09-08
Advisory updated
2026-09-21

Who should care

Defenders responsible for Windows systems, especially those with internet-facing interfaces, should assess exposure and prioritize patching. This includes administrators of Windows 10, Windows 11, and Windows Server environments.

Why it matters

CVE-2026-72942 is a MEDIUM severity vulnerability in Windows Spaceport.sys that allows an unauthorized attacker to disclose information over a network. Defenders should prioritize verifying exposure of Windows systems, especially those with internet-facing interfaces, and apply patches as available.

  • Potential information disclosure over the network
  • Verification of exposure required for Windows systems
  • Patching necessary to prevent potential exploitation
  • Monitoring network traffic for potential information disclosure attempts

Technical summary

The vulnerability is an out-of-bounds read in Windows Spaceport.sys, which could allow an unauthorized attacker to disclose information over a network. This issue has been assigned a CVSS score of 6.5 and a severity of MEDIUM. Affected software configurations include various versions of Windows 10, Windows 11, and Windows Server.

Defensive priority

Defenders should prioritize verifying exposure of Windows systems, especially those with internet-facing interfaces, and apply patches as available.

Recommended defensive actions

  • Verify exposure of Windows systems, especially those with internet-facing interfaces
  • Apply patches as available from Microsoft
  • Monitor network traffic for potential information disclosure attempts

Evidence notes

The vulnerability is described as an out-of-bounds read in Windows Spaceport.sys, which could allow information disclosure over a network. Affected versions include Windows 10, Windows 11, and various Windows Server versions. Microsoft has provided a patch advisory for this vulnerability.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-72942 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-72942

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

  • CVE-2026-72942 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-72942

    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.