Out-of-Bounds Read in Windows DHCP Server

Publication date: 2026-09-08

Last updated on: 2026-09-08

Assigner: Microsoft Corporation

Description

Out-of-bounds read in Windows DHCP Server allows an unauthorized attacker to deny service over a network.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-09-08

Last Modified

2026-09-08

Generated

2026-09-09

AI Q&A

2026-09-09

EPSS Evaluated

N/A

NVD

CVE-2026-77886

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 unauthorized attacker to cause a denial of service over a network by exploiting this flaw.

Impact Analysis

The impact includes network disruption as the DHCP server may become unavailable, leading to potential loss of network connectivity for clients relying on it for IP address assignment.

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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