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CVE-2026-50463 Microsoft CVE debrief

CVE-2026-50463 is an out-of-bounds read vulnerability in the Windows Kernel. This vulnerability allows an unauthorized attacker to disclose information over a network. The vulnerability has a CVSS score of 7.5 and a severity of HIGH. The vulnerability affects multiple versions of Windows 10, Windows 11, and Windows Server. System administrators and users should be aware of this vulnerability and take necessary actions to mitigate it. The vulnerability is caused by an out-of-bounds read in the Windows Kernel, which allows an attacker to access sensitive information.

Vendor
Microsoft
Product
Windows 10 Version 1809
CVSS
HIGH 7.5
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 users of Windows 10, Windows 11, and Windows Server should be aware of this vulnerability and take necessary actions to mitigate it. The vulnerability has a high CVSS score and severity, and defenders should prioritize patching and mitigation efforts. Additionally, security teams and vulnerability management teams should review the vulnerability and implement additional security measures to prevent exploitation.

Technical summary

The vulnerability is caused by an out-of-bounds read in the Windows Kernel. This allows an attacker to access sensitive information. The vulnerability affects multiple versions of Windows 10, Windows 11, and Windows Server. The exact technical details of the vulnerability are still being investigated. However, it is known that the vulnerability can be exploited over a network, and defenders should prioritize patching and mitigation efforts.

Defensive priority

High

Recommended defensive actions

  • Apply the patch provided by Microsoft
  • Ensure that Windows 10, Windows 11, and Windows Server systems are up-to-date
  • Monitor systems for suspicious activity
  • Implement additional security measures such as network segmentation and access controls
  • Review compensating controls for exposed systems while remediation is scheduled and verified

Evidence notes

The CVE record was published on 2026-07-14T18:17:51.707Z and was last modified on 2026-07-21T14:39:26.713Z. The NVD entry is currently Analyzed. The vulnerability has been confirmed in multiple sources, including the CVE record and NVD. However, the exact scope and impact of the vulnerability are still being investigated. Defenders should verify the affected systems and apply patches or mitigations as recommended by the vendor.

Official resources

AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-07-14T18:17:51.707Z and has not been modified since then. The NVD entry is currently Analyzed.