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CVE-2026-78452 Microsoft CVE debrief

A CVE record for an out-of-bounds read vulnerability in Microsoft Windows SCSI Class System File was published on 2026-09-08T18:20:43.637Z and last modified on 2026-09-11T18:57:20.857Z. The vulnerability allows an unauthorized attacker to disclose information with a physical attack. Microsoft has provided a vendor advisory and patch for this vulnerability.

Vendor
Microsoft
Product
Windows 10 Version 1809
CVSS
MEDIUM 4.6
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 systems, particularly those with physical access to the systems, should assess exposure and apply patches provided by Microsoft.

Why it matters

Defenders should care about CVE-2026-78452 because it allows unauthorized information disclosure with a physical attack, impacting Windows systems. Assess exposure, apply patches, and verify system configurations.

  • Information disclosure with physical access
  • Potential data exposure with successful exploitation

Technical summary

The CVE-2026-78452 vulnerability is an out-of-bounds read issue in the Microsoft Windows SCSI Class System File. This vulnerability allows an unauthorized attacker to disclose information with a physical attack. The CVSS score for this vulnerability is 4.6, indicating a medium severity.

Defensive priority

Medium priority for defenders to assess exposure and apply patches

Recommended defensive actions

  • Assess exposure of Windows systems to this vulnerability
  • Apply patches provided by Microsoft
  • Verify system configurations and inventory
  • Review compensating controls for exposed systems while remediation is scheduled and verified
  • Check relevant monitoring, detection, and logs for exposed assets that need extra review.

Evidence notes

The CVE record and NVD vulnerability detail provide information on the vulnerability, its impact, and affected systems. The evidence is based on official CVE Program and NVD sources. Defenders should verify system configurations and inventory within their environments to ensure exposure assessment and patch application. The CVE Program and NVD provide authoritative details, but defenders must consider their specific contexts and configurations. Limited source detail is available; thus,

Sources and references

Verified primary and authoritative sources

  • CVE-2026-78452 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-78452

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

  • CVE-2026-78452 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-78452

    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.