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CVE-2026-69342 Microsoft CVE debrief

AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-09-08T17:15:14.447Z and has not been modified since then. This high-severity vulnerability in Windows DHCP Server could allow an unauthorized attacker to deny service over a network. Defenders should assess exposure and prioritize patching. The vulnerability is an out-of-bounds read in Windows DHCP Server. Affected products 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.

Vendor
Microsoft
Product
Windows 10 Version 1607
CVSS
HIGH 7.5
CISA KEV
Not listed in stored evidence
Original CVE published
2026-09-08
Original CVE updated
2026-10-08
Advisory published
2026-09-08
Advisory updated
2026-10-08

Who should care

Defenders responsible for Windows DHCP Server installations should assess exposure and prioritize patching, as this vulnerability could allow an attacker to deny service.

Why it matters

CVE-2026-69342 is a high-severity vulnerability in Windows DHCP Server that could allow an unauthorized attacker to deny service over a network. Defenders should prioritize verifying exposure and applying patches.

  • Potential denial of service over a network
  • Need to verify exposure of Windows DHCP Server installations
  • Priority on applying patches from Microsoft
  • Monitoring for unauthorized access attempts

Technical summary

An out-of-bounds read in Windows DHCP Server allows an unauthorized attacker to deny service over a network. Affected products 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 of Windows DHCP Server installations and applying patches, as an unauthorized attacker could exploit this vulnerability to deny service over a network.

Recommended defensive actions

  • Verify exposure of Windows DHCP Server installations
  • Apply patches from Microsoft
  • Monitor for unauthorized access attempts

Evidence notes

The CVE Program record and NVD vulnerability detail provide official information about the vulnerability. Microsoft's advisory is referenced as a supplemental source.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-69342 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-69342

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-69342 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-69342

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

  • Windows DHCP Server Denial of Service Vulnerability

    Unverified legacy reference

    URL: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/69xxx/CVE-2026-69342.json

    cve_program_cvelist_v5

  • Source reference

    Unverified legacy reference

    URL: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69342

    Supplemental source - vendor-advisory, patch

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.