CVE-2026-88114

Summary

A pointer dereference vulnerability in Microsoft's DNS Server allows remote attackers to execute arbitrary code when processing DNS queries. This represents a critical security flaw that can be exploited without authentication over the network.

Exploitability

Exploitation is relatively straightforward requiring only network access to send specially crafted DNS queries, with no authentication required and minimal preconditions.

Blast radius

The vulnerability affects multiple Windows versions including Windows 10 and 11, potentially allowing attackers to compromise a large number of endpoints that have DNS server functionality enabled.

Detection

Monitor for unusual DNS query patterns or malformed DNS responses in network traffic logs, particularly looking for DNS server process crashes or abnormal memory usage patterns in DNS Server service logs.

Prioritized remediation

Apply the Microsoft security update KB5043628 for Windows 10 version 1607, Windows 10 version 1809, Windows 10 version 21H2, Windows 10 version 22H2, Windows 11 version 23H2, Windows 11 version 24H2, and Windows 11 version 25H2.

Analysis generated locally by garnet-coder (no data left the box). AI-assisted — verify against primary sources before acting.