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PatchSiren cyber security CVE debrief

CVE-2026-48564 Microsoft CVE debrief

A heap-based buffer overflow vulnerability exists in the Windows DHCP Server, which could allow an authorized attacker to execute code over a network. The vulnerability has a CVSS score of 8.8 and is classified as HIGH severity. This issue is particularly concerning for organizations that rely on Windows DHCP Server for network management, as it could be exploited to gain unauthorized access and control over network resources. System administrators should review the official advisory and CVE record to understand the affected scope, severity, and recommended vendor guidance. Additionally, they should assess their current deployments, apply patches or mitigations, and implement compensating controls such as network segmentation and access controls to limit the attack surface.

Vendor
Microsoft
Product
Windows 10 Version 1607
CVSS
HIGH 8.8
CISA KEV
Not listed in stored evidence
Original CVE published
2026-07-14
Original CVE updated
2026-07-16
Advisory published
2026-07-14
Advisory updated
2026-07-16

Who should care

System administrators and security teams responsible for managing Windows DHCP Server installations should be aware of this vulnerability and take necessary actions to mitigate it. This includes reviewing the official advisory and CVE record, assessing current deployments, applying patches or mitigations, and implementing compensating controls. Additionally, security teams should monitor system logs for suspicious activity and consider implementing additional security measures, such as intrusion detection and prevention systems.

Technical summary

The vulnerability is caused by a heap-based buffer overflow in the Windows DHCP Server. An authorized attacker could exploit this vulnerability to execute code over a network. The vulnerability has been assigned a CVSS score of 8.8 and is classified as HIGH severity. The affected products include Windows 10, Windows Server 2012, Windows Server 2016, Windows Server 2019, Windows Server 2022, and Windows Server 2025. To mitigate this vulnerability, it is essential to apply the patch provided by Microsoft to vulnerable systems and conduct a thorough inventory of Windows DHCP Server installations to identify potential targets.

Defensive priority

High

Recommended defensive actions

  • Apply the patch provided by Microsoft to vulnerable systems
  • Conduct a thorough inventory of Windows DHCP Server installations to identify potential targets
  • Implement compensating controls, such as network segmentation and access controls, to limit the attack surface
  • Monitor system logs for suspicious activity
  • Consider implementing additional security measures, such as intrusion detection and prevention systems

Evidence notes

The vulnerability is based on information from the NVD and Microsoft. The CVE record was published on 2026-07-14T17:16:49.873Z and was last modified on 2026-07-16T16:35:15.907Z. The NVD entry is currently Analyzed. However, the exact scope of affected products and potential workarounds are still being verified. Further investigation is needed to confirm the presence of vulnerable deployments in managed environments and to validate the effectiveness of proposed mitigations.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-48564 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-48564

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

  • CVE-2026-48564 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-48564

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

Supplemental 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.