CVE-2026-96248

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Windows Host Guardian Service Stack-Based Buffer Overflow

Publication date: 2026-10-13

Last updated on: 2026-10-13

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

2026-10-13

Generated

2026-10-14

AI Q&A

2026-10-14

EPSS Evaluated

N/A

NVD

CVE-2026-96248

EUVD

EUVD-2026-99758

Affected Vendors & Products

Vendor	Product	Version / Range
Microsoft	Windows	10 Version 1607 10.0.14393.0
Microsoft	Windows	10 Version 1809 10.0.17763.0
Microsoft	Windows	Server 2016 10.0.14393.0
Microsoft	Windows	Server 2016 (Server Core installation) 10.0.14393.0
Microsoft	Windows	Server 2019 10.0.17763.0
Microsoft	Windows	Server 2019 (Server Core installation) 10.0.17763.0
Microsoft	Windows	Server 2022 10.0.20348.0
Microsoft	Windows	Server 2025 10.0.26100.0
Microsoft	Windows	Server 2025 (Server Core installation) 10.0.26100.0

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.

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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