CVE-2026-62878

Analyzed Analyzed - Analysis Complete

Windows DNS Server Stack-Based Buffer Overflow

Publication date: 2026-08-11

Last updated on: 2026-08-17

Assigner: Microsoft Corporation

Description

Stack-based buffer overflow in Windows DNS allows an unauthorized attacker to execute code over a network.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-08-11

Last Modified

2026-08-17

Generated

2026-09-01

AI Q&A

2026-08-11

EPSS Evaluated

2026-08-30

NVD

CVE-2026-62878

EUVD

EUVD-2026-56400

Affected Vendors & Products

Vendor	Product	Version / Range
microsoft	windows_server_2012	r2
microsoft	windows_server_2012	*
microsoft	windows_10_1607	to 10.0.14393.9418 (exc)
microsoft	windows_10_1607	to 10.0.14393.9418 (exc)
microsoft	windows_server_2016	to 10.0.14393.9418 (exc)
microsoft	windows_server_2022	to 10.0.20348.5440 (exc)
microsoft	windows_server_2025	to 10.0.26100.33222 (exc)
microsoft	windows_10_1809	to 10.0.17763.9121 (exc)
microsoft	windows_10_1809	to 10.0.17763.9121 (exc)
microsoft	windows_server_2019	to 10.0.17763.9121 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-121	A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).

Attack-Flow Graph

Executive Summary

This is a stack-based buffer overflow vulnerability in Windows DNS. It allows an unauthorized attacker to execute arbitrary code remotely over a network by exploiting a flaw in how Windows DNS handles certain network requests.

Detection Guidance

This vulnerability is a stack-based buffer overflow in Windows DNS. Detection typically requires checking for unusual network traffic or DNS server crashes. Use Windows Event Viewer to inspect DNS server logs for errors or warnings. Monitor for unexpected process terminations or system instability related to DNS services.

Impact Analysis

An attacker could exploit this to run malicious code on your system, potentially taking control of your device, stealing data, or installing malware. Since it affects Windows DNS, any system running vulnerable DNS services could be at risk.

Compliance Impact

This vulnerability allows remote code execution via a stack-based buffer overflow in Windows DNS, which could lead to unauthorized access or data breaches. Such breaches may violate compliance requirements under GDPR (data protection) or HIPAA (health data security) if sensitive information is exposed.

Mitigation Strategies

Apply the latest security updates from Microsoft to patch the Windows DNS stack-based buffer overflow vulnerability. Monitor Microsoft's advisory for updates and ensure DNS services are running the patched versions.

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