CVE-2026-88122

Analyzed Analyzed - Analysis Complete

Out-of-Bounds Read in Windows DNS Server

Publication date: 2026-10-13

Last updated on: 2026-10-16

Assigner: Microsoft Corporation

Description

Out-of-bounds read in DNS Server allows an authorized attacker to deny service over a network.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-10-13

Last Modified

2026-10-16

Generated

2026-10-19

AI Q&A

2026-10-14

EPSS Evaluated

2026-10-18

NVD

CVE-2026-88122

EUVD

EUVD-2026-100155

Affected Vendors & Products

Vendor	Product	Version / Range
microsoft	windows_server_2012	r2
microsoft	windows_server_2012	*
microsoft	windows_server_2016	to 10.0.14393.9612 (exc)
microsoft	windows_server_2019	to 10.0.17763.9376 (exc)
microsoft	windows_server_2025	to 10.0.26100.33650 (exc)
microsoft	windows_server_2022	to 10.0.20348.5761 (exc)

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 flaw in the DNS Server component of Microsoft Windows Server. An authorized attacker can exploit this to cause a denial of service over a network by triggering an out-of-bounds memory read, which may crash or disrupt the DNS service.

Impact Analysis

The impact is a denial of service, meaning the DNS service may become unavailable, leading to network disruptions, inability to resolve domain names, and potential loss of connectivity for systems relying on DNS.

Compliance Impact

This vulnerability primarily causes denial of service, which could disrupt critical services. While not directly violating GDPR or HIPAA, such disruptions may impact data availability requirements under these regulations.

Mitigation Strategies

Apply the latest security updates from Microsoft to patch the DNS Server vulnerability. Monitor network traffic for unusual DNS server activity that may indicate exploitation attempts.

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