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PatchSiren cyber security CVE debrief

CVE-2026-96849 Microsoft CVE debrief

An information disclosure vulnerability exists in Windows Kernel-Mode Drivers. An authorized attacker could exploit this vulnerability to disclose information locally. This vulnerability is a medium-severity issue that could allow local attackers to disclose sensitive information. System administrators and security teams should assess exposure and apply patches. The vulnerability exists due to the use of an uninitialized resource in Windows Kernel-Mode Drivers. Microsoft has released a vendor advisory and patch for the vulnerability.

Vendor
Microsoft
Product
Windows 11 version 26H1
CVSS
MEDIUM 5.5
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

Local system administrators and security teams responsible for Windows 11 version 26H1 systems should assess exposure and apply patches. System administrators need to review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance. Security teams should monitor system logs for potential exploitation attempts and review compensating controls for exposed systems while rem

Why it matters

CVE-2026-96849 is a medium-severity information disclosure vulnerability in Windows Kernel-Mode Drivers. Local attackers could exploit this vulnerability to disclose sensitive information. System administrators and security teams should assess exposure, apply patches, and monitor system logs.

  • Local attackers could disclose sensitive information
  • System administrators need to assess exposure and apply patches
  • Security teams should monitor system logs for potential exploitation attempts

Technical summary

The vulnerability exists in Windows Kernel-Mode Drivers due to the use of an uninitialized resource. An authorized attacker could exploit this vulnerability to disclose information locally. This issue affects Windows 11 version 26H1 systems. Local system administrators and security teams should assess exposure and apply patches from Microsoft for Windows Kernel-Mode Drivers.

Defensive priority

Medium priority for local system administrators and security teams to assess exposure and apply patches.

Recommended defensive actions

  • Assess exposure of Windows 11 version 26H1 systems to CVE-2026-96849
  • Apply patches from Microsoft for Windows Kernel-Mode Drivers
  • Monitor system logs for potential exploitation attempts

Evidence notes

The CVE record and source item provide limited information about the vulnerability. Microsoft has released a vendor advisory and patch for the vulnerability.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-96849 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-96849

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

  • CVE-2026-96849 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-96849

    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.