CVE-2026-96248

Analyzed Analyzed - Analysis Complete

Windows Host Guardian Service Stack-Based Buffer Overflow

Publication date: 2026-10-13

Last updated on: 2026-10-16

Assigner: Microsoft Corporation

Description

Stack-based buffer overflow in Windows Host Guardian Service allows an unauthorized attacker to deny service over a network.

CVSS Scores

EPSS Scores

Probability:
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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-2026-96248

EUVD

EUVD-2026-99758

Affected Vendors & Products

Vendor	Product	Version / Range
microsoft	windows_server_2022	to 10.0.20348.5761 (exc)
microsoft	windows_10_1607	to 10.0.14393.9612 (exc)
microsoft	windows_10_1607	to 10.0.14393.9612 (exc)
microsoft	windows_10_1809	to 10.0.17763.9376 (exc)
microsoft	windows_10_1809	to 10.0.17763.9376 (exc)
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)

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 the Windows Host Guardian Service. It allows an unauthorized attacker to cause a denial of service over a network by exploiting a flaw that overwrites memory on the stack.

Impact Analysis

An attacker could exploit this to crash the Windows Host Guardian Service, leading to service disruption. This may affect systems relying on this service for security or management, potentially causing downtime or loss of functionality.

Compliance Impact

This vulnerability enables denial of service attacks, which could disrupt critical services. For GDPR, availability is a key principle, and such disruptions may risk compliance. HIPAA requires safeguards against service disruptions affecting protected health information; this flaw could impact that.

Mitigation Strategies

Apply the latest security updates from Microsoft to patch the Windows Host Guardian Service. Monitor Microsoft's security advisories for updates and ensure all affected systems are updated promptly.

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