Out-of-Bounds Read in Windows DHCP Server

Publication date: 2026-09-08

Last updated on: 2026-09-24

Assigner: Microsoft Corporation

Description

Out-of-bounds read in Windows DHCP Server allows an authorized attacker to execute code locally.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-09-08

Last Modified

2026-09-24

Generated

2026-09-29

AI Q&A

2026-09-09

EPSS Evaluated

2026-09-27

NVD

CVE-2026-77891

Affected Vendors & Products

Vendor	Product	Version / Range
microsoft	dhcp_server	*

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-125	The product reads data past the end, or before the beginning, of the intended buffer.

Attack-Flow Graph

Executive Summary

This vulnerability is an out-of-bounds read issue in the Windows DHCP Server. It allows an authorized attacker to execute code locally on the affected system by exploiting memory access beyond allocated bounds.

Impact Analysis

An attacker could gain control over the system, install programs, view or delete data, or create new accounts with full user rights. This requires the attacker to already have authorized access to the system.

Mitigation Strategies

Apply the latest security updates from Microsoft for the DHCP Server component to patch the out-of-bounds read vulnerability.

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