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High severity8.0NVD Advisory· Published Nov 10, 2026· Updated Nov 10, 2026

CVE-2026-88240

CVE-2026-88240

Description

Heap-based buffer overflow in Windows DHCP Client allows an authorized attacker to elevate privileges over an adjacent network.

Affected products

1

Microsoft/Windows DHCP Clientllm-fuzzy

Patches

Vulnerability mechanics

References

1

msrc.microsoft.com/update-guide/vulnerability/CVE-2026-88240nvd

News mentions

1

Microsoft November 2026 Patch Tuesday Fixes 1,093 Vulnerabilities, Including Outlook Zero-Day
Cyber Security News · Nov 10, 2026