CVE-2026-62823

Analyzed Analyzed - Analysis Complete

Heap-based Buffer Overflow in Windows DHCP Server

Publication date: 2026-08-11

Last updated on: 2026-08-16

Assigner: Microsoft Corporation

Description

Heap-based buffer overflow in Windows DHCP Server allows an unauthorized attacker to execute code over an adjacent network.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-08-11

Last Modified

2026-08-16

Generated

2026-09-01

AI Q&A

2026-08-11

EPSS Evaluated

2026-08-30

NVD

CVE-2026-62823

EUVD

EUVD-2026-56675

Affected Vendors & Products

Vendor	Product	Version / Range
microsoft	windows_server_2012	r2
microsoft	windows_10_1607	to 10.0.14393.9418 (exc)
microsoft	windows_10_1607	to 10.0.14393.9418 (exc)
microsoft	windows_10_1809	to 10.0.17763.9115 (exc)
microsoft	windows_10_1809	to 10.0.17763.9115 (exc)
microsoft	windows_server_2016	to 10.0.14393.9418 (exc)
microsoft	windows_server_2019	to 10.0.17763.9115 (exc)
microsoft	windows_server_2022	to 10.0.20348.5440 (exc)
microsoft	windows_server_2025	to 10.0.26100.33222 (exc)
microsoft	windows_server_2012	to 6.2.9200.26280 (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 Server. It allows an unauthorized attacker to execute arbitrary code over an adjacent network by exploiting a flaw in memory handling.

Detection Guidance

Detection requires checking for vulnerable Windows DHCP Server versions. Use PowerShell: Get-WindowsFeature -Name 'DHCP' to verify DHCP server installation. Check installed updates with Get-HotFix -Id KB* to ensure the latest patches are applied.

Impact Analysis

An attacker could gain control of the affected system, leading to potential data breaches, system compromise, or further network infiltration. The impact includes unauthorized code execution with high privileges.

Compliance Impact

This vulnerability could lead to unauthorized access and data exfiltration, violating confidentiality requirements in GDPR and HIPAA. Organizations may face compliance violations, fines, or legal consequences if exploited.

Mitigation Strategies

Apply the latest security update from Microsoft for Windows DHCP Server to patch the heap-based buffer overflow vulnerability.

Hi! I’m here to help you understand CVE-2026-62823. Ask me anything about the vulnerability, its impact, or mitigation strategies.

0/70