CVE-2026-69839: Windows iSCSI Target Service Denial of Service Vulnerability
Uncaught exception in Windows iSCSI Target Service allows an authorized attacker to deny service over a network.
Other sources
Windows iSCSI Target Service Denial of Service Vulnerability
— Microsoft
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.14393.9512Patch KB5123099 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26100.33438Patch KB5122871 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 6.3.9600.23397Patch KB5123066 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 6.2.9200.26349Patch KB5123065 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.20348.5622Patch KB5122882 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.17763.9245Patch KB5122876
Event History
Frequently Asked Questions
What level of access does an attacker need to exploit this issue?
The attacker must be authorized and have network access to the affected Windows iSCSI Target Service. No user interaction is required.
What is the expected impact of a successful attack?
A successful exploit can deny service by triggering an uncaught exception in the Windows iSCSI Target Service. The provided information does not indicate confidentiality or integrity impact.
Which systems should be prioritized for review?
Review systems running the Windows iSCSI Target Service on the listed Windows 10, Windows Server 2012, Windows Server 2012 R2, Windows Server 2016, Windows Server 2019, Windows Server 2022, or Windows Server 2025 platforms. Systems that expose the service over the network to authorized users are the relevant attack surface.