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CVE-2026-50383 Microsoft CVE debrief

A buffer over-read vulnerability exists in Windows Print Spooler Components, which could allow an authorized attacker to disclose information locally. The vulnerability has a CVSS score of 6.1 and a medium severity level. Microsoft has released a patch for this vulnerability, and users are advised to apply it as soon as possible. This vulnerability affects multiple versions of Windows, including Windows 10, Windows 11, and Windows Server. The vulnerability is a buffer over-read issue, which allows an attacker to access sensitive information. The Common Vulnerability Scoring System (CVSS) vector for this vulnerability is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:L. It is essential for system administrators and users of Windows operating systems to be aware of this vulnerability and take steps to mitigate it.

Vendor
Microsoft
Product
Windows 10 Version 1809
CVSS
MEDIUM 6.1
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

System administrators and users of Windows operating systems should be aware of this vulnerability and take steps to mitigate it. This vulnerability requires local access and authorization, but could still have significant impacts on affected systems.

Technical summary

The CVE-2026-50383 vulnerability is a buffer over-read issue in the Windows Print Spooler Components. This vulnerability allows an authorized attacker to disclose information locally. The Common Vulnerability Scoring System (CVSS) score for this vulnerability is 6.1, indicating a medium severity level. The CVSS vector for this vulnerability is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:L.

Defensive priority

Medium

Recommended defensive actions

  • Apply the patch released by Microsoft to fix the vulnerability
  • Ensure that only authorized users have access to the affected systems
  • Monitor system logs for potential exploitation attempts
  • Consider implementing additional security measures to protect against local attacks

Evidence notes

The CVE-2026-50383 vulnerability was published on July 14, 2026, and last modified on July 20, 2026. The vulnerability affects multiple versions of Windows, including Windows 10, Windows 11, and Windows Server. Microsoft has released a patch for this vulnerability, which is available through their update guide.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-50383 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-50383

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

  • CVE-2026-50383 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-50383

    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.