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CVE-2026-85859 is a medium severity vulnerability in Microsoft Windows 10 Version 1607 involving a null pointer dereference in the Windows Message Queuing Queue Manager. This flaw allows an authorized attacker to cause a denial of service (DoS) over a network by triggering the null pointer dereference. The vulnerability affects multiple Windows 10 builds prior to their respective patched versions. An official fix is available from Microsoft.

This vulnerability, identified as CWE-476 (NULL Pointer Dereference), exists in the Windows Message Queuing Queue Manager component of Microsoft Windows 10 Version 1607 and related builds. An authorized attacker can exploit this flaw remotely over a network to cause a denial of service by triggering a null pointer dereference, leading to system instability or crash. The CVSS v3.1 base score is 6.5, indicating a medium severity level. The vulnerability affects multiple Windows 10 versions starting from build 10.0.14393.0 up to but not including various patched builds such as 10.0.14393.9612 and others. Microsoft has released official patches to address this issue.

CVE-2026-85859 is a medium severity vulnerability in Microsoft Windows 10 Version 1607 involving a null pointer dereference in the Windows Message Queuing Queue Manager. This flaw allows an authorized attacker to cause a denial of service (DoS) over a network by triggering the null pointer dereferen

CVE-2026-85859: CWE-476: NULL Pointer Dereference in Microsoft Windows 10 Version 1607

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