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PatchSiren cyber security CVE debrief

CVE-2026-45588 Microsoft CVE debrief

CVE-2026-45588 is a protection mechanism failure in Windows Secure Boot, which allows an authorized attacker to bypass a security feature locally. The vulnerability has a CVSS score of 7.9 and is classified as HIGH severity. It was published on 2026-06-09T17:17:26.743Z and modified on 2026-06-11T15:25:25.750Z.

Vendor
Microsoft
Product
Windows 10 Version 1607
CVSS
HIGH 7.9
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-09
Original CVE updated
2026-06-11
Advisory published
2026-06-09
Advisory updated
2026-06-11

Who should care

Administrators and users of affected Microsoft Windows versions should prioritize patching this vulnerability to prevent potential local attacks.

Technical summary

The vulnerability is caused by a protection mechanism failure in Windows Secure Boot, allowing an authorized attacker to bypass a security feature locally. The CVSS vector is CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N, indicating a local attack vector with high privileges required.

Defensive priority

High

Recommended defensive actions

  • Apply patches from Microsoft as soon as possible, especially for affected Windows versions: Windows 10, Windows 11, and Windows Server.
  • Review and update Secure Boot configurations to ensure they are properly set up and enforced.
  • Monitor system logs for potential suspicious activity related to Secure Boot bypass attempts.

Evidence notes

The CVE record and NVD detail pages provide comprehensive information about the vulnerability, including affected versions and potential impacts.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-45588 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-45588

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

  • CVE-2026-45588 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-45588

    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.