CVE-2026-62803

Analyzed Analyzed - Analysis Complete

Improper Link Resolution in Windows DHCP Server

Publication date: 2026-08-11

Last updated on: 2026-08-16

Assigner: Microsoft Corporation

Description

Improper link resolution before file access ('link following') in Windows DHCP Server 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

2026-08-16

Generated

2026-09-01

AI Q&A

2026-08-11

EPSS Evaluated

2026-08-30

NVD

CVE-2026-62803

EUVD

EUVD-2026-56671

Affected Vendors & Products

Vendor	Product	Version / Range
microsoft	windows_server_2012	r2
microsoft	windows_server_2012	*
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)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-59	The product attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource.

Attack-Flow Graph

Executive Summary

This vulnerability is an improper link resolution issue in Windows DHCP Server that allows an authorized attacker to elevate their privileges locally by exploiting link following.

Detection Guidance

Detection requires checking for unauthorized privilege escalation attempts on Windows DHCP Server. Monitor for unusual file access patterns or unexpected privilege changes. Review Windows Event Logs for DHCP-related errors or suspicious activities.

Impact Analysis

An attacker could gain higher privileges on your system, potentially allowing them to perform unauthorized actions or access sensitive data if they have local access.

Compliance Impact

This vulnerability allows local privilege escalation in Windows DHCP Server, which could enable unauthorized access to sensitive system files or configurations. Such unauthorized access may lead to violations of data protection requirements under GDPR or HIPAA if it results in exposure or tampering of personal or health data.

Mitigation Strategies

Apply the latest security updates from Microsoft to patch the Windows DHCP Server vulnerability. Monitor Microsoft's advisory for updates and restrict local access to authorized users only.

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