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CVE-2026-50490 Microsoft CVE debrief

AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-07-14T18:17:55.290Z and has not been modified since then. The NVD entry is currently Analyzed. This vulnerability, known as CVE-2026-50490, is a use-after-free issue in the Windows Installer that allows an authorized local attacker to elevate privileges. The vulnerability is caused by improper handling of memory, leading to a use-after-free condition. System administrators and users of Windows 10, Windows 11, and Windows Server products should be aware of this vulnerability and take steps to mitigate it. The CVE record and NVD detail provide information on the vulnerability, including its description, CVSS score, and affected products.

Vendor
Microsoft
Product
Windows 10 Version 1607
CVSS
HIGH 7
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 users of Windows 10, Windows 11, and Windows Server products should be aware of this vulnerability and take steps to mitigate it. This includes applying the available patch from Microsoft, ensuring that all Windows systems are up-to-date with the latest security patches, and implementing compensating controls, such as restricting access to sensitive areas of the system. Additionally, monitoring system logs for suspicious activity and performing regular vulnerability assessments and penetration testing are recommended.

Technical summary

A use-after-free vulnerability exists in the Windows Installer, which allows an authorized local attacker to elevate privileges. The vulnerability is caused by the improper handling of memory, leading to a use-after-free condition. This issue affects Windows 10, Windows 11, and Windows Server products. Microsoft has provided a patch for this vulnerability, and it is recommended to apply the patch and ensure that all Windows systems are up-to-date with the latest security patches.

Defensive priority

High

Recommended defensive actions

  • Apply the available patch from Microsoft
  • Ensure that all Windows systems are up-to-date with the latest security patches
  • Implement compensating controls, such as restricting access to sensitive areas of the system
  • Monitor system logs for suspicious activity
  • Perform regular vulnerability assessments and penetration testing

Evidence notes

The CVE record and NVD detail provide information on the vulnerability, including its description, CVSS score, and affected products. Microsoft has provided a patch for this vulnerability. The NVD entry is currently Analyzed. The source item URL for CVE-2026-50490 is available. The official CVE record for CVE-2026-50490 and the NVD detail for CVE-2026-50490, including CVSS score and affected products, are available. However, the scope of affected products and potential impact on various environments is not detailed in the provided sources. Further verification is needed to assess the vulnerability's impact on specific deployments.

Official resources

AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-07-14T18:17:55.290Z and has not been modified since then.