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CVE-2026-69396 Microsoft CVE debrief

CVE-2026-69396 is a high-severity vulnerability in Windows NDIS that allows an authorized attacker to elevate privileges over a network. The vulnerability has a CVSS score of 7.1 and is classified as HIGH. Microsoft has acknowledged the vulnerability, and defenders should assess exposure and prioritize remediation. This vulnerability affects Windows systems with NDIS configurations, and its exploitation could lead to unauthorized privilege escalation. Defenders should verify exposure by checking Windows NDIS configurations and assessing network privileges.

Vendor
Microsoft
Product
Windows 10 Version 1607
CVSS
HIGH 7.1
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 NDIS configurations and network security should assess exposure and prioritize remediation. This includes system administrators managing Windows systems, network security teams monitoring activity for potential exploitation attempts, and vulnerability management teams verifying exposure and applying Microsoft's security updates.

Why it matters

CVE-2026-69396 is a high-severity vulnerability in Windows NDIS that allows an authorized attacker to elevate privileges over a network. Defenders should assess exposure and prioritize remediation.

  • Defenders must verify exposure and apply remediation to prevent privilege escalation.
  • Network security teams should monitor activity for potential exploitation attempts.
  • System administrators should prioritize applying Microsoft's security updates.

Technical summary

The vulnerability is a use-after-free issue in Windows NDIS, which allows an authorized attacker to elevate privileges over a network. The CVSS vector is CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H. This issue arises from improper handling of network packets, leading to potential privilege escalation. Affected systems include those with Windows NDIS configurations that are accessible over a network.

Defensive priority

Defenders should prioritize verifying exposure and applying remediation, as the vulnerability allows privilege escalation over a network.

Recommended defensive actions

  • Verify exposure by checking Windows NDIS configurations and assessing network privileges.
  • Prioritize remediation by applying Microsoft's security updates.
  • Monitor network activity for potential exploitation attempts.

Evidence notes

The vulnerability is described as a use-after-free issue in Windows NDIS, which allows an authorized attacker to elevate privileges over a network. The CVSS vector is CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-69396 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-69396

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

  • CVE-2026-69396 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-69396

    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.