---
id: CVE-2026-65681
title: Windows iSCSI Target Service Denial of Service Vulnerability
summary: >-
  Null pointer dereference in Windows iSCSI Target Service allows an
  unauthorized attacker to deny service over a network.
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C'
cvssSource: cna
cwe:
  - CWE-476
vendor: Microsoft
product: Windows 10 Version 1607
affected:
  - windows_10_version_1607 >= 10.0.14393.0 < 10.0.14393.9418
  - windows_10_version_1809 >= 10.0.17763.0 < 10.0.17763.9121
  - windows_server_2016 >= 10.0.14393.0 < 10.0.14393.9418
  - >-
    windows_server_2016_server_core_installation >= 10.0.14393.0 <
    10.0.14393.9418
  - windows_server_2019 >= 10.0.17763.0 < 10.0.17763.9121
  - >-
    windows_server_2019_server_core_installation >= 10.0.17763.0 <
    10.0.17763.9121
  - windows_server_2022 >= 10.0.20348.0 < 10.0.20348.5499
  - windows_server_2025 >= 10.0.26100.0 < 10.0.26100.33296
  - >-
    windows_server_2025_server_core_installation >= 10.0.26100.0 <
    10.0.26100.33296
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-08-11T18:05:13.426094Z'
published: '2026-08-11'
updated: '2026-09-25'
sourceUpdated: '2026-09-25T19:38:39.283Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-65681'
references:
  - url: 'https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-65681'
    label: Windows iSCSI Target Service Denial of Service Vulnerability
tags:
  - cve.org
epss: 0.01174
epssPercentile: 0.66155
ingestedAt: '2026-09-08T18:07:34.889Z'
---

## Overview

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

## Affected

- `windows_10_version_1607 >= 10.0.14393.0 < 10.0.14393.9418`
- `windows_10_version_1809 >= 10.0.17763.0 < 10.0.17763.9121`
- `windows_server_2016 >= 10.0.14393.0 < 10.0.14393.9418`
- `windows_server_2016_server_core_installation >= 10.0.14393.0 < 10.0.14393.9418`
- `windows_server_2019 >= 10.0.17763.0 < 10.0.17763.9121`
- `windows_server_2019_server_core_installation >= 10.0.17763.0 < 10.0.17763.9121`
- `windows_server_2022 >= 10.0.20348.0 < 10.0.20348.5499`
- `windows_server_2025 >= 10.0.26100.0 < 10.0.26100.33296`
- `windows_server_2025_server_core_installation >= 10.0.26100.0 < 10.0.26100.33296`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.