CVE-2026-62736

Analyzed Analyzed - Analysis Complete

Heap-based Buffer Overflow in Windows DHCP Client

Publication date: 2026-08-11

Last updated on: 2026-08-13

Assigner: Microsoft Corporation

Description

Heap-based buffer overflow in Windows DHCP Client allows an authorized attacker to elevate privileges locally.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-08-11

Last Modified

2026-08-13

Generated

2026-09-01

AI Q&A

2026-08-12

EPSS Evaluated

2026-08-30

NVD

CVE-2026-62736

EUVD

EUVD-2026-56648

Affected Vendors & Products

Vendor	Product	Version / Range
microsoft	windows_11_23h2	to 10.0.22631.7517 (exc)
microsoft	windows_11_23h2	to 10.0.22631.7517 (exc)
microsoft	windows_11_24h2	to 10.0.26100.9106 (exc)
microsoft	windows_11_24h2	to 10.0.26100.9106 (exc)
microsoft	windows_11_26h1	to 10.0.28000.2704 (exc)
microsoft	windows_11_26h1	to 10.0.28000.2704 (exc)
microsoft	windows_11_25h2	to 10.0.26200.9106 (exc)
microsoft	windows_11_25h2	to 10.0.26200.9106 (exc)
microsoft	windows_server_2025	to 10.0.26100.33222 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-122	A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().

Attack-Flow Graph

Executive Summary

This is a heap-based buffer overflow vulnerability in the Windows DHCP Client. It allows an authorized attacker with local access to elevate their privileges on the system.

Detection Guidance

This vulnerability is a local privilege escalation issue in the Windows DHCP Client. Detection typically involves checking for unusual DHCP client behavior or known indicators of compromise. Use Windows Event Viewer to review logs for DHCP-related errors or unexpected client activity. Microsoft's security update guide may provide specific detection guidance.

Impact Analysis

An attacker could exploit this to gain higher-level permissions on your system, potentially allowing them to install programs, view or delete data, or create new accounts with full user rights.

Compliance Impact

This vulnerability allows local privilege escalation via a heap-based buffer overflow in the Windows DHCP Client. While not directly impacting data protection standards like GDPR or HIPAA, unauthorized privilege escalation could lead to unauthorized access to sensitive data, potentially violating compliance requirements related to access controls and data security.

Mitigation Strategies

Apply the latest security updates from Microsoft to patch the heap-based buffer overflow in the Windows DHCP Client. Monitor Microsoft's update guide for the specific patch release.

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