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PatchSiren cyber security CVE debrief

CVE-2026-85865 Microsoft CVE debrief

AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-10-13T19:00:10.104Z and has not been modified since then. The Windows DHCP Server Security Feature Bypass Vulnerability allows an authorized attacker to bypass a security feature locally. 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. Defenders should verify exposure, especially in local network contexts, and prioritize patching from Microsoft. The vulnerability requires defenders to assess exposure and prioritize patch

Vendor
Microsoft
Product
Windows 10 Version 1607
CVSS
MEDIUM 5.5
CISA KEV
Not listed in stored evidence
Original CVE published
2026-10-13
Original CVE updated
2026-10-13
Advisory published
2026-10-13
Advisory updated
2026-10-13

Who should care

Defenders responsible for Windows DHCP Server deployments, especially in local network contexts, should assess exposure and prioritize patching.

Why it matters

The Windows DHCP Server Security Feature Bypass Vulnerability requires defenders to verify exposure, especially in local network contexts, and prioritize patching from Microsoft.

  • Local attackers may bypass a security feature in Windows DHCP Server.
  • Defenders need to verify exposure in their Windows DHCP Server deployments.
  • Patching from Microsoft is required to address the vulnerability.

Technical summary

The Windows DHCP Server Security Feature Bypass Vulnerability allows an authorized attacker to bypass a security feature locally. 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 in Windows DHCP Server deployments, especially in local network contexts.

Recommended defensive actions

  • Verify Windows DHCP Server deployments for exposure, especially in local network contexts.
  • Assess the security configuration of affected Windows versions.
  • Apply patches from Microsoft as available.

Evidence notes

The CVE record and source item provide details on the Windows DHCP Server Security Feature Bypass Vulnerability. However, specific details on exploitation, impact, and remediation are limited.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-85865 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-85865

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

  • CVE-2026-85865 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-85865

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

Supplemental references

  • Windows DHCP Server Security Feature Bypass Vulnerability

    Unverified legacy reference

    URL: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/85xxx/CVE-2026-85865.json

    cve_program_cvelist_v5

  • Source reference

    Unverified legacy reference

    URL: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-85865

    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.