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PatchSiren cyber security CVE debrief

CVE-2026-70299 Microsoft CVE debrief

The Windows Bind Filter Driver Elevation of Privilege Vulnerability, tracked as CVE-2026-70299, is a significant security issue affecting Windows 11 version 23H2 and Windows Server 2025 systems. This vulnerability allows an authorized attacker to elevate privileges locally due to improper access control in the Windows Bind Filter Driver. The vulnerability was published on 2026-10-13T18:59:56.881Z and has not been modified since then. The CVE record and source item provide details on the vulnerability, including affected products and versions. Defenders responsible for these systems should assess exposure and apply patches or updates to address the vulnerability. The vulnerability's

Vendor
Microsoft
Product
Windows 11 version 23H2
CVSS
HIGH 8.8
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 11 version 23H2 and Windows Server 2025 systems should assess exposure and apply patches or updates to address the vulnerability.

Why it matters

The Windows Bind Filter Driver Elevation of Privilege Vulnerability allows an authorized attacker to elevate privileges locally, posing a risk to Windows 11 version 23H2 and Windows Server 2025 systems.

  • Verify exposure of Windows 11 version 23H2 and Windows Server 2025 systems
  • Apply patches or updates to address the vulnerability
  • Monitor systems for potential exploitation attempts

Technical summary

The Windows Bind Filter Driver Elevation of Privilege Vulnerability allows an authorized attacker to elevate privileges locally due to improper access control in the Windows Bind Filter Driver. This vulnerability affects Windows 11 version 23H2 and Windows Server 2025 systems. The vulnerability is a result of inadequate access control mechanisms within the Windows Bind Filter Driver, which could allow an attacker with local access to elevate their privileges. This could potentially lead to unauthorized access and control over affected systems. The CVE record and

Defensive priority

Defenders should prioritize verifying exposure and applying patches for Windows 11 version 23H2 and Windows Server 2025 systems.

Recommended defensive actions

  • Verify exposure of Windows 11 version 23H2 and Windows Server 2025 systems to this vulnerability
  • Apply patches or updates provided by Microsoft to address the vulnerability
  • Monitor systems for potential exploitation attempts

Evidence notes

The CVE record and source item provide details on the Windows Bind Filter Driver Elevation of Privilege Vulnerability, including affected products and versions.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-70299 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-70299

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

  • CVE-2026-70299 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-70299

    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.