CVE-2026-69930 Microsoft CVE debrief

Who should care

Defenders responsible for Windows DHCP Server installations, especially in environments where unauthorized network access is a concern, should assess exposure and apply patches.

Why it matters

The Windows DHCP Server Information Disclosure Vulnerability allows unauthorized attackers to disclose information over a network, emphasizing the need for defenders to verify exposure, apply patches, and monitor network traffic.

• Verify exposure of Windows DHCP Server installations to unauthorized network access
• Apply patches to prevent information disclosure
• Monitor network traffic for potential exploitation attempts
• Review incident response plans for potential information disclosure incidents

Technical summary

An out-of-bounds read vulnerability in Windows DHCP Server allows an unauthorized attacker to disclose information over a network. Affected versions include Windows 10 Version 1607, Windows 10 Version 1809, Windows Server 2012, Windows Server 2012 R2, Windows Server 2016, Windows Server 2019, Windows Server 2022, and Windows Server 2025.

Defensive priority

Defenders should prioritize verifying exposure and applying patches for Windows DHCP Server installations, especially in environments where unauthorized network access is a concern.

Recommended defensive actions

• Verify Windows DHCP Server installations for exposure
• Apply patches from Microsoft
• Monitor network traffic for unauthorized access attempts
• Review and update incident response plans

Evidence notes

The CVE record and source item provide details on the vulnerability, but limited information is available on exploitation or specific impacts. The source item from cve_program_cvelist_v5 and CVE Program record with source-provided CVE metadata are referenced. Official NIST NVD detail page and source-specific vulnerability assessment also provide relevant information. Defenders should verify exposure and apply patches from Microsoft, while monitoring network traffic for unauthorized to

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.