CVE-2026-70058

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Out-of-Bounds Write in Windows DHCP Server

Publication date: 2026-10-13

Last updated on: 2026-10-13

Assigner: Microsoft Corporation

Description

Out-of-bounds write in Windows DHCP Server allows an unauthorized attacker to execute code over a network.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-10-13

Last Modified

2026-10-13

Generated

2026-10-19

AI Q&A

2026-10-14

EPSS Evaluated

2026-10-18

NVD

CVE-2026-70058

EUVD

EUVD-2026-99142

Affected Vendors & Products

Vendor	Product	Version / Range
Microsoft	Windows	10 Version 1607 10.0.14393.0
Microsoft	Windows	10 Version 1809 10.0.17763.0
Microsoft	Windows	Server 2012 6.2.9200.0
Microsoft	Windows	Server 2012 (Server Core installation) 6.2.9200.0
Microsoft	Windows	Server 2012 R2 6.3.9600.0
Microsoft	Windows	Server 2012 R2 (Server Core installation) 6.3.9600.0
Microsoft	Windows	Server 2016 10.0.14393.0
Microsoft	Windows	Server 2016 (Server Core installation) 10.0.14393.0
Microsoft	Windows	Server 2019 10.0.17763.0
Microsoft	Windows	Server 2019 (Server Core installation) 10.0.17763.0
Microsoft	Windows	Server 2022 10.0.20348.0
Microsoft	Windows	Server 2025 10.0.26100.0
Microsoft	Windows	Server 2025 (Server Core installation) 10.0.26100.0

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-787	The product writes data past the end, or before the beginning, of the intended buffer.

Attack-Flow Graph

Executive Summary

This is an out-of-bounds write vulnerability in the Windows DHCP Server. It allows an unauthorized attacker to execute arbitrary code remotely over a network without needing authentication.

Impact Analysis

An attacker could exploit this to run malicious code on affected systems, potentially gaining control over the server. This could lead to data breaches, service disruption, or further network compromise.

Compliance Impact

This vulnerability allows remote code execution via an out-of-bounds write in Windows DHCP Server. Such unauthorized access could lead to data breaches, unauthorized data modification, or service disruption, which may violate compliance requirements under GDPR (data protection) and HIPAA (health data security).

Mitigation Strategies

Apply the latest security updates from Microsoft for Windows DHCP Server to patch the out-of-bounds write vulnerability. Monitor Microsoft's security advisories for updates and disable DHCP Server service if not in use.

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