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PatchSiren cyber security CVE debrief

CVE-2026-26169 Microsoft CVE debrief

A buffer over-read in the Windows Kernel Memory allows an authorized attacker to disclose information locally. Multiple Windows versions are affected, including Windows 10, Windows 11, and Windows Server. This vulnerability has a medium severity and requires patching and verification of system configurations to mitigate potential risks. System administrators and security teams should prioritize patching and verifying system configurations to mitigate potential risks. The affected products include Windows 10 Version 1607, Windows 10 Version 1809, Windows 10 Version 21H2, Windows 10 Version 22H2, Windows 11 version 23H2, Windows 11 Version 23H2, Windows 11 Version 24H2, Windows 11 26

Vendor
Microsoft
Product
Windows 10 Version 1607
CVSS
MEDIUM 6.1
CISA KEV
Not listed in stored evidence
Original CVE published
2026-04-14
Original CVE updated
2026-10-15
Advisory published
2026-04-14
Advisory updated
2026-10-15

Who should care

System administrators and security teams responsible for Windows systems, especially those managing Windows 10, Windows 11, and Windows Server environments, should assess exposure and apply patches or mitigations as needed.

Why it matters

CVE-2026-26169 is a medium-severity vulnerability in Windows Kernel Memory that allows local information disclosure. System administrators and security teams should prioritize patching and verifying system configurations to mitigate potential risks.

  • Local information disclosure possible for authorized attackers
  • Patching required for affected Windows versions
  • Verification of system configurations and inventory needed
  • Monitoring system logs for potential exploitation attempts recommended

Technical summary

The vulnerability is caused by a buffer over-read in the Windows Kernel Memory, allowing an authorized attacker to disclose information locally. The affected products include Windows 10 Version 1607, Windows 10 Version 1809, Windows 10 Version 21H2, Windows 10 Version 22H2, Windows 11 version 23H2, Windows 11 Version 23H2, Windows 11 Version 24H2, Windows 11 Version 25H2, Windows 11 version 26H1, Windows Server 2016, Windows Server 2016 (Server Core installation), Windows Server 2019, Windows Server 2019 (Server Core installation), Windows Server 2022, Windows Server 2022, 23H2 Edition (Server Core installation), Windows Server 2025, and Windows Server 2025 (Server Core installation).

Defensive priority

Medium priority for patching and verification

Recommended defensive actions

  • Apply patches from Microsoft for affected Windows versions
  • Verify system configurations and inventory for affected versions
  • Monitor system logs for potential exploitation attempts

Evidence notes

The CVE Program and NVD provide official records of the vulnerability. Microsoft provides a vendor advisory with patch information. The vulnerability has been publicly disclosed and patches are available. Official CVE Program record with source-provided CVE metadata. Official NIST NVD detail page and source-specific vulnerability assessment. Vendor advisory and patch information from Microsoft.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-26169 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-26169

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

  • CVE-2026-26169 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-26169

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

  • Windows Kernel Memory Information Disclosure Vulnerability

    Unverified legacy reference

    URL: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/26xxx/CVE-2026-26169.json

    cve_program_cvelist_v5

  • Source reference

    Unverified legacy reference

    URL: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-26169

    Supplemental source - vendor-advisory, patch

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.