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PatchSiren cyber security CVE debrief

CVE-2026-62749 Microsoft CVE debrief

AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-08-11T17:06:07.020Z and has not been modified since then. This vulnerability affects Windows 11 and Windows Server 2025 systems, allowing an authorized attacker to elevate privileges locally due to a use-after-free issue in the Windows Kernel. Defenders should prioritize verifying exposure and applying patches to prevent potential security incidents. The CVE record and source item provide details on the vulnerability, but limited information is available on exploitation or impact.

Vendor
Microsoft
Product
Windows 11 Version 24H2
CVSS
HIGH 7
CISA KEV
Not listed in stored evidence
Original CVE published
2026-08-11
Original CVE updated
2026-10-08
Advisory published
2026-08-11
Advisory updated
2026-10-08

Who should care

Defenders responsible for Windows 11 and Windows Server 2025 systems should assess exposure and apply patches to prevent potential elevation of privilege attacks.

Why it matters

CVE-2026-62749 is a high-severity elevation of privilege vulnerability in the Windows Kernel. Defenders should prioritize verifying exposure and applying patches to prevent potential security incidents.

  • Verify exposure of Windows 11 and Windows Server 2025 systems
  • Apply patches to prevent elevation of privilege attempts
  • Monitor systems for potential security incidents

Technical summary

CVE-2026-62749 is a Windows Kernel Elevation of Privilege Vulnerability. An authorized attacker can elevate privileges locally due to a use-after-free issue in the Windows Kernel. This vulnerability affects Windows 11 and Windows Server 2025 systems. Defenders should prioritize verifying exposure and applying patches to prevent potential security incidents. The vulnerability has a CVSS score of 7 and a CVSS severity of HIGH.

Defensive priority

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

Recommended defensive actions

  • Verify exposure of Windows 11 and Windows Server 2025 systems to CVE-2026-62749
  • Apply patches from Microsoft for affected systems
  • Monitor systems for potential elevation of privilege attempts

Evidence notes

The CVE record and source item provide details on the vulnerability, but limited information is available on exploitation or impact. Defenders should verify exposure of Windows 11 and Windows Server 2025 systems and apply patches from Microsoft for affected systems. The vulnerability has a high-severity elevation of privilege issue in the Windows Kernel, allowing an authorized attacker to elevate privileges locally.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-62749 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-62749

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

  • CVE-2026-62749 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-62749

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

Supplemental references

  • Windows Kernel Elevation of Privilege Vulnerability

    Unverified legacy reference

    URL: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/62xxx/CVE-2026-62749.json

    cve_program_cvelist_v5

  • Source reference

    Unverified legacy reference

    URL: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-62749

    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.