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PatchSiren cyber security CVE debrief

CVE-2026-50306 Microsoft CVE debrief

CVE-2026-50306 is a high-severity vulnerability in Windows TCP/IP that allows an authorized attacker to elevate privileges locally. The vulnerability is caused by a use-after-free issue in the Windows TCP/IP component. This type of vulnerability can be particularly dangerous as it allows an attacker with local access to gain elevated privileges, potentially leading to a complete compromise of the system. System administrators and users of Windows operating systems should be aware of this vulnerability and take necessary precautions to mitigate it. The vulnerability has a CVSS score of 7.8 and is classified as HIGH severity.

Vendor
Microsoft
Product
Windows 10 Version 1607
CVSS
HIGH 7.8
CISA KEV
Not listed in stored evidence
Original CVE published
2026-07-14
Original CVE updated
2026-07-16
Advisory published
2026-07-14
Advisory updated
2026-07-16

Who should care

System administrators and users of Windows operating systems should be aware of this vulnerability and take necessary precautions to mitigate it. This includes applying the patch provided by Microsoft, ensuring that all Windows operating systems are up-to-date, and monitoring system logs for suspicious activity. Additionally, security teams should review compensating controls for exposed systems while remediation is scheduled and verified.

Technical summary

The vulnerability is caused by a use-after-free issue in the Windows TCP/IP component. An authorized attacker can exploit this vulnerability to elevate privileges locally. The vulnerability has a CVSS score of 7.8 and is classified as HIGH severity. This type of vulnerability can be particularly dangerous as it allows an attacker with local access to gain elevated privileges, potentially leading to a complete compromise of the system. To mitigate this vulnerability, it is essential to apply the patch provided by Microsoft and ensure that all Windows operating systems are up-to-date.

Defensive priority

High

Recommended defensive actions

  • Apply the patch provided by Microsoft
  • Ensure that all Windows operating systems are up-to-date
  • Monitor system logs for suspicious activity
  • Implement additional security measures to prevent local privilege escalation
  • Review compensating controls for exposed systems while remediation is scheduled and verified

Evidence notes

The vulnerability is documented in the CVE record and the NVD detail page. Microsoft has provided a patch for this vulnerability. The affected product is Windows operating system. The vulnerability has a high severity and allows an authorized attacker to elevate privileges locally. The CVE record was published on 2026-07-14T18:17:28.497Z and has not been modified since then. The NVD entry is currently Analyzed. To verify, defenders should review system logs for suspicious activity and ensure that all Windows operating systems are up-to-date.

Official resources

AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-07-14T18:17:28.497Z and has not been modified since then. The NVD entry is currently Analyzed.