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CVE-2026-50370 Microsoft CVE debrief

CVE-2026-50370 is a high-severity vulnerability in Windows DHCP Server that allows an unauthorized attacker to execute code over an adjacent network. The vulnerability has a CVSS score of 8.8 and is classified as HIGH. Microsoft has released a patch for this vulnerability, and users are advised to apply it as soon as possible. The affected products include Windows 10, Windows Server 2012, Windows Server 2016, Windows Server 2019, Windows Server 2022, and Windows Server 2025. System administrators and security teams should be aware of this vulnerability and take immediate action to patch affected systems. The vulnerability is a heap-based buffer overflow, which can be exploited by an attacker to execute arbitrary code. The attack requires adjacent network access, and the impact can be significant if exploited successfully.

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
2026-07-20
Advisory published
2026-07-14
Advisory updated
2026-07-20

Who should care

System administrators and security teams responsible for managing Windows DHCP Server installations should be aware of this vulnerability and take immediate action to patch affected systems. This includes reviewing the current deployment of Windows DHCP Server, identifying potential exposure, and prioritizing patching based on risk and impact. Additionally, security teams should monitor for suspicious activity and implement compensating controls to mitigate the vulnerability while patching is being applied.

Technical summary

The vulnerability is a heap-based buffer overflow in Windows DHCP Server that allows an unauthorized attacker to execute code over an adjacent network. The vulnerability has been assigned a CVSS score of 8.8 and is classified as HIGH. The affected products include Windows 10, Windows Server 2012, Windows Server 2016, Windows Server 2019, Windows Server 2022, and Windows Server 2025.

Defensive priority

High

Recommended defensive actions

  • Apply the patch released by Microsoft
  • Conduct a thorough inventory of affected systems
  • Implement compensating controls to mitigate the vulnerability
  • Monitor for suspicious activity
  • Retest and verify patch effectiveness

Evidence notes

The CVE record was published on 2026-07-14T18:17:37.850Z and was last modified on 2026-07-20T14:52:20.130Z. The NVD entry is currently Analyzed. The vulnerability has been confirmed in Windows DHCP Server, with a CVSS score of 8.8 and classified as HIGH. Microsoft has released a patch for this vulnerability. Users are advised to apply it as soon as possible. The affected products include Windows 10, Windows Server 2012, Windows Server 2016, Windows Server 2019, Windows Server 2022, and Windows Server 2025. However, detailed information about the vulnerability, such as the attack vector and potential impact, is limited. Further verification and defensive measures are necessary.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-50370 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-50370

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

  • CVE-2026-50370 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-50370

    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.