CVE-2026-65681

Analyzed Analyzed - Analysis Complete

Null pointer dereference in Windows iSCSI Target Service

Publication date: 2026-08-11

Last updated on: 2026-08-16

Assigner: Microsoft Corporation

Description

Null pointer dereference in Windows iSCSI Target Service allows an unauthorized attacker to deny service over a network.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-08-11

Last Modified

2026-08-16

Generated

2026-09-01

AI Q&A

2026-08-11

EPSS Evaluated

2026-08-30

NVD

CVE-2026-65681

EUVD

EUVD-2026-56725

Affected Vendors & Products

Vendor	Product	Version / Range
microsoft	windows_10_1607	to 10.0.14393.9418 (exc)
microsoft	windows_10_1607	to 10.0.14393.9418 (exc)
microsoft	windows_10_1809	to 10.0.17763.9115 (exc)
microsoft	windows_10_1809	to 10.0.17763.9115 (exc)
microsoft	windows_server_2016	to 10.0.14393.9418 (exc)
microsoft	windows_server_2019	to 10.0.17763.9115 (exc)
microsoft	windows_server_2022	to 10.0.20348.5440 (exc)
microsoft	windows_server_2025	to 10.0.26100.33222 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-476	The product dereferences a pointer that it expects to be valid but is NULL.

Attack-Flow Graph

Executive Summary

This vulnerability is a null pointer dereference flaw in the Windows iSCSI Target Service. It allows an unauthorized attacker to cause a denial of service over a network by exploiting this issue.

Detection Guidance

Detection requires checking for the presence of the Windows iSCSI Target Service and monitoring for crashes or service failures. Use PowerShell commands like 'Get-Service -Name MSiSCSI' to verify if the service is running. Check Windows Event Logs for iSCSI-related errors or crashes under 'System' or 'Application' logs.

Impact Analysis

An attacker could exploit this to disrupt the Windows iSCSI Target Service, causing network services to become unavailable. This may lead to downtime for systems relying on iSCSI storage.

Compliance Impact

This vulnerability causes a denial of service in the Windows iSCSI Target Service, which could disrupt network services. While it does not directly affect data confidentiality or integrity, prolonged service disruption may impact compliance with regulations requiring availability of critical systems, such as HIPAA for healthcare data or GDPR for data processing operations.

Mitigation Strategies

Apply the latest security updates from Microsoft to patch the Windows iSCSI Target Service vulnerability. Monitor network traffic for unusual activity targeting the iSCSI service.

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