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PatchSiren cyber security CVE debrief

CVE-2026-58545 Microsoft CVE debrief

AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-07-14T18:18:42.543Z and has not been modified since then. The NVD entry is currently Analyzed. This medium-severity vulnerability, CVE-2026-58545, is caused by improper access control in the Windows Kernel, allowing authorized attackers to bypass a security feature locally, potentially leading to elevated privileges. The vulnerability has a CVSS score of 5.5 and is classified under CWE-284. Affected products include various versions of Windows 10, Windows 11, and Windows Server. Security teams responsible for Windows systems should assess the impact of CVE-2026-58545. Microsoft has provided a patch for this vulnerability, and it is recommended to apply the security patch, review and update access control configurations for Windows Kernel, monitor system logs for suspicious activity related to local privilege escalation, and ensure that all Windows systems are up-to-date with the latest security patches.

Vendor
Microsoft
Product
Windows 10 Version 1607
CVSS
MEDIUM 5.5
CISA KEV
Not listed in stored evidence
Original CVE published
2026-07-14
Original CVE updated
2026-07-22
Advisory published
2026-07-14
Advisory updated
2026-07-22

Who should care

Security teams responsible for Windows systems should assess the impact of CVE-2026-58545, as it allows authorized attackers to bypass security features locally, potentially leading to elevated privileges.

Technical summary

CVE-2026-58545 is a medium-severity vulnerability in the Windows Kernel due to improper access control. An authorized attacker could exploit this vulnerability locally to bypass a security feature. The vulnerability has a CVSS score of 5.5 and is classified under CWE-284. Affected products include various versions of Windows 10, Windows 11, and Windows Server.

Defensive priority

Apply patches or mitigations provided by Microsoft to address CVE-2026-58545, as it could allow attackers to bypass security features and potentially gain elevated access.

Recommended defensive actions

  • Apply the security patch provided by Microsoft for CVE-2026-58545.
  • Review and update access control configurations for Windows Kernel.
  • Monitor system logs for suspicious activity related to local privilege escalation.
  • Ensure that all Windows systems are up-to-date with the latest security patches.

Evidence notes

The CVE record and NVD details indicate that CVE-2026-58545 has been analyzed and is related to improper access control in the Windows Kernel. Microsoft has provided a patch for this vulnerability.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-58545 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-58545

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

  • CVE-2026-58545 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-58545

    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.