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High severity8.1NVD Advisory· Published Nov 10, 2026· Updated Nov 10, 2026

CVE-2026-109459

CVE-2026-109459

Description

Heap-based buffer overflow in Windows Message Queuing Queue Manager allows an unauthorized attacker to execute code over a network.

Affected products

1

Microsoft/Windows Message Queuingllm-fuzzy

Patches

Vulnerability mechanics

References

1

msrc.microsoft.com/update-guide/vulnerability/CVE-2026-109459nvd

News mentions

2

Microsoft Patch Tuesday November 2027 , (Tue, Nov 10th)
SANS Internet Storm Center · Nov 10, 2026
Microsoft November 2026 Patch Tuesday Fixes 1,093 Vulnerabilities, Including Outlook Zero-Day
Cyber Security News · Nov 10, 2026