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Severity by source

Vendor (microsoft) PRIMARY
8.4 HIGH
AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CIRCL (temporal)
7.3 HIGH
cvss
vuln.today AI
8.4 HIGH

Local trigger with no privileges or interaction (AV:L/AC:L/PR:N/UI:N); use-after-free code execution in the service yields full C/I/A impact within an unchanged scope.

3.1 AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
4.0 AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Primary rating from Vendor (microsoft).

CVSS VectorVendor: microsoft

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

2
Analysis Generated
Jul 14, 2026 - 19:36 vuln.today
CVE Published
Jul 14, 2026 - 17:08 nvd
HIGH 8.4

DescriptionCVE.org

Use after free in Windows DHCP Client allows an unauthorized attacker to execute code locally.

AnalysisAI

Local code execution in the Windows DHCP Client service stems from a use-after-free (CWE-416) memory-corruption flaw affecting a broad range of Windows 10, Windows 11, and Windows Server releases (Server 2012 through Server 2025). Per the CVSS vector an unauthenticated attacker with local access can achieve high-impact code execution with no user interaction. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Obtain local access to Windows host
Delivery
Interact with DHCP Client service
Exploit
Trigger use-after-free in dhcpcore
Execution
Corrupt heap and hijack control flow
Impact
Execute arbitrary code in service context

Vulnerability AssessmentAI

Exploitation Exploitation requires local access to the target Windows system (AV:L) with the DHCP Client service running, which is its default state on virtually all Windows installations that obtain addressing dynamically. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The signals are mixed but lean toward a genuine patch-priority item. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An attacker who has gained a local, unprivileged foothold on a Windows host (for example via a low-privilege account or prior malware execution) triggers the use-after-free in the DHCP Client service to corrupt heap memory and execute arbitrary code in the service's context, escalating impact on the machine. No user interaction and no elevated privileges are required per the CVSS vector, and low attack complexity means the trigger is reliable. …
Remediation Patch available per vendor advisory - apply the Microsoft security update for CVE-2026-54128 for each affected SKU as documented at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-54128, which is the primary and recommended fix. … Detailed patch versions, workarounds, and compensating controls in full report.

Recommended ActionAI

Within 24 hours, inventory all Windows 10, 11, and Windows Server (2012-2025) systems and identify mission-critical servers for priority patching. …

Sign in for detailed remediation steps and compensating controls.

Threat intelligence, references, and detailed analysis are available after sign-in.

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EUVD-2026-44149 vulnerability details – vuln.today

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