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PatchSiren cyber security CVE debrief

CVE-2026-50377 Microsoft CVE debrief

An AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-07-14T18:17:39.010Z and has not been modified since then. The NVD entry is currently Analyzed. This vulnerability is an out-of-bounds read in the Windows Kernel, allowing an authorized attacker to elevate privileges locally. The CVSS score is 5.5 and the severity is MEDIUM. System administrators and security teams responsible for Windows systems, especially those with elevated privileges, should be aware of this vulnerability. The vulnerability has a medium priority due to the potential for local privilege escalation.

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
2026-07-21
Advisory published
2026-07-14
Advisory updated
2026-07-21

Who should care

System administrators and security teams responsible for Windows systems, especially those with elevated privileges, should be aware of this vulnerability. They should review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance.

Technical summary

CVE-2026-50377 is an out-of-bounds read vulnerability in the Windows Kernel. An authorized attacker can exploit this vulnerability to elevate privileges locally. The vulnerability has a CVSS score of 5.5 and a severity of MEDIUM. This vulnerability affects Windows systems and has a medium priority due to the potential for local privilege escalation.

Defensive priority

Medium priority due to the potential for local privilege escalation. System administrators and security teams should plan vendor-supported updates or mitigations through normal change control where exposure is confirmed.

Recommended defensive actions

  • Apply the vendor patch from Microsoft
  • Conduct a thorough inventory of Windows systems
  • Implement compensating controls such as monitoring for suspicious activity
  • Verify and enforce secure configurations for Windows systems
  • Consider additional security measures such as least privilege access

Evidence notes

The CVE record and NVD detail provide information on the vulnerability. Microsoft has provided a patch and vendor advisory for this issue. The vulnerability is an out-of-bounds read in the Windows Kernel, allowing an authorized attacker to elevate privileges locally. The CVSS score is 5.5 and the severity is MEDIUM. System administrators and security teams should be aware of this vulnerability, especially those with elevated privileges. The NVD entry is currently Analyzed. The CVE record was published on 2026-07-14T18:17:39.010Z and has not been modified since then.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-50377 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-50377

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

  • CVE-2026-50377 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-50377

    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.