CVE-2026-69989

Analyzed Analyzed - Analysis Complete

Use After Free in DNS Server Allows Remote Code Execution

Publication date: 2026-09-08

Last updated on: 2026-09-24

Assigner: Microsoft Corporation

Description

Use after free in DNS Server allows an unauthorized attacker to execute code over a network.

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-2026-69989

Affected Vendors & Products

Vendor	Product	Version / Range
microsoft	dns_server	*

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-416	The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

Attack-Flow Graph

Executive Summary

This vulnerability is a use after free issue in a DNS Server. It allows an unauthorized attacker to execute arbitrary code over a network by exploiting a memory corruption flaw.

Impact Analysis

An attacker could exploit this to run malicious code on affected systems, potentially leading to data breaches, system compromise, or denial of service. Systems running vulnerable DNS Server software are at risk.

Compliance Impact

This vulnerability could lead to unauthorized access or data exfiltration, violating confidentiality requirements in GDPR and HIPAA. Organizations may face compliance violations if exploited.

Mitigation Strategies

Apply the latest security updates from Microsoft to patch the DNS Server vulnerability. Monitor network traffic for unusual activity and restrict unauthorized access to DNS services.

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