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PatchSiren cyber security CVE debrief

CVE-2026-45595 Microsoft CVE debrief

CVE-2026-45595 is a protection mechanism failure in Windows Mark of the Web (MOTW) that allows an unauthorized attacker to bypass a security feature over a network. The vulnerability has a CVSS score of 5.4 and a severity of MEDIUM.

Vendor
Microsoft
Product
Windows 10 Version 1607
CVSS
MEDIUM 5.4
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

Users of Microsoft Windows 10, Windows 11, and Windows Server products should be aware of this vulnerability and take necessary actions to mitigate it.

Technical summary

The vulnerability is caused by a protection mechanism failure in Windows Mark of the Web (MOTW). This allows an unauthorized attacker to bypass a security feature over a network.

Defensive priority

MEDIUM

Recommended defensive actions

  • Apply patches from Microsoft as they become available.
  • Refer to https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45595 for vendor advisory and mitigation guidance.

Evidence notes

The CVE record and details are sourced from official databases.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-45595 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-45595

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

  • CVE-2026-45595 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-45595

    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.