CVE-2026-50683: Windows DHCP Client Elevation of Privilege Vulnerability

highCVSS 8CVE-2026-50683

Heap-based buffer overflow in Windows DHCP Server allows an authorized attacker to elevate privileges over an adjacent network.

CSIRTS triage

vendor: Microsoft product: Windows DHCP Server Privilege escalation

What: Heap-based buffer overflow in Windows DHCP Server allows an authorized attacker to elevate privileges over an adjacent network.
Who is affected: Authorized users of Windows DHCP Server.
Urgency: Remediation is urgent due to the high severity and potential for privilege escalation.
Action: Apply the latest security patch for Windows DHCP Server.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source: Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity: high — CVSS 8
Published: 2026-07-14
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50683

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.

Low exploitation riskCVE-2026-506830.49% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 39% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-50683	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

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

Recent advisories for Windows DHCP Client

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.

highCVE-2026-54128: Use after free in Windows DHCP Client allows an unauthorized attacker to execute code locally.nvd · 2026-07-14
highCVE-2026-49181: Integer underflow (wrap or wraparound) in Windows DHCP Client allows an unauthorized attacker …nvd · 2026-07-14
highCVE-2026-54128: Windows DHCP Client Remote Code Execution Vulnerabilitymsrc · 2026-07-14
highCVE-2026-49181: Windows DHCP Client Elevation of Privilege Vulnerabilitymsrc · 2026-07-14
mediumCVE-2026-45608: Windows DHCP Client Information Disclosure Vulnerabilitymsrc · 2026-06-09
mediumCVE-2026-45634: Windows DHCP Client Information Disclosure Vulnerabilitymsrc · 2026-06-09