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CVE-2026-50518: Windows DHCP Server Remote Code Execution Vulnerability

criticalCVSS 9.8CVE-2026-50518
Heap-based buffer overflow in Windows DHCP Server allows an unauthorized attacker to execute code over a network.

CSIRTS triage

vendor: Microsoftproduct: Windows DHCP ServerRemote code execution
What
Heap-based buffer overflow in Windows DHCP Server allows an unauthorized attacker to execute code over a network.
Who is affected
Unauthorized attackers targeting Windows DHCP Server.
Urgency
Remediation is critical due to the high severity and potential for remote code execution.
Action
Apply the latest security patch for Windows DHCP Server.

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Details

Source
Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity
critical — CVSS 9.8
Published
2026-07-14
Exploitation
Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50518

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2026-50518coverage & exploitation statusNVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

Recent advisories for Windows DHCP Server

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

More from Microsoft Security Response Center