CVE-2026-69782
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Race Condition in DNS Server Allows Remote Code Execution

Vulnerability report for CVE-2026-69782, including description, CVSS score, EPSS score, affected products, exploitability, helpful resources, and attack-flow context.

Publication date: 2026-09-08

Last updated on: 2026-09-24

Assigner: Microsoft Corporation

Description

Concurrent execution using shared resource with improper synchronization ('race condition') 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
2026-09-10
EPSS Evaluated
2026-09-27
NVD

Affected Vendors & Products

Showing 10 associated CPEs
Vendor Product Version / Range
microsoft windows_server_2012 r2
microsoft windows_server_2012 *
microsoft windows_10_1607 to 10.0.14393.9512 (exc)
microsoft windows_10_1607 to 10.0.14393.9512 (exc)
microsoft windows_10_1809 to 10.0.17763.9245 (exc)
microsoft windows_10_1809 to 10.0.17763.9245 (exc)
microsoft windows_server_2025 to 10.0.26100.33438 (exc)
microsoft windows_server_2016 to 10.0.14393.9512 (exc)
microsoft windows_server_2019 to 10.0.17763.9245 (exc)
microsoft windows_server_2022 to 10.0.20348.5622 (exc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-362 The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.
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 Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.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

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Executive Summary

This is a race condition vulnerability in a DNS Server where improper synchronization during concurrent execution allows unauthorized attackers to execute code remotely over a network.

Impact Analysis

An attacker could exploit this to run malicious code on the affected DNS Server, potentially gaining control over it, disrupting services, or stealing sensitive data.

Compliance Impact

This vulnerability could lead to unauthorized access or data breaches, violating compliance requirements for GDPR, HIPAA, and other regulations that mandate strict data protection and access controls.

Mitigation Strategies

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

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