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9.8
CVE-2026-65791: Windows iSCSI Target Service Remote Code Execution
CVE-2026-65791 · published 23 days ago
Summary
The Windows iSCSI Target Service is affected by a vulnerability that could allow an attacker to execute malicious code on a computer from another network location. This could potentially allow an attacker to take control of the computer or disrupt its operation. To protect against this vulnerability, consider applying the latest updates from Microsoft.
What to do
- Update microsoft windows 10 version 1607 to version 10.0.14393.9418 or later.
- Update microsoft windows server 2016 to version 10.0.14393.9418 or later.
- Update microsoft windows server 2016 (server core installation) to version 10.0.14393.9418 or later.
- Update microsoft windows server 2022 to version 10.0.20348.5499 or later.
- Update microsoft windows server 2025 to version 10.0.26100.33296 or later.
- Update microsoft windows server 2025 (server core installation) to version 10.0.26100.33296 or later.
- Update microsoft windows_10_1607 to version 10.0.14393.9418 or later.
- Update microsoft windows_10_1809 to version 10.0.17763.9115 or later.
- Update microsoft windows_server_2016 to version 10.0.14393.9418 or later.
- Update microsoft windows_server_2019 to version 10.0.17763.9115 or later.
- Update microsoft windows_server_2022 to version 10.0.20348.5440 or later.
- Update microsoft windows_server_2025 to version 10.0.26100.33222 or later.
Affected software
| Vendor | Product | Affected versions |
|---|---|---|
| microsoft | windows 10 version 1607 | < 10.0.14393.9418 |
| microsoft | windows 10 version 1809 |
< 10.0.17763.9115 < 10.0.17763.9121 |
| microsoft | windows server 2012 |
< 6.2.9200.26279 < 6.2.9200.26280 |
| microsoft | windows server 2012 (server core installation) |
< 6.2.9200.26279 < 6.2.9200.26280 |
| microsoft | windows server 2012 r2 |
< 6.3.9600.23337 < 6.3.9600.23338 |
| microsoft | windows server 2012 r2 (server core installation) |
< 6.3.9600.23337 < 6.3.9600.23338 |
| microsoft | windows server 2016 | < 10.0.14393.9418 |
| microsoft | windows server 2016 (server core installation) | < 10.0.14393.9418 |
| microsoft | windows server 2019 |
< 10.0.17763.9115 < 10.0.17763.9121 |
| microsoft | windows server 2019 (server core installation) |
< 10.0.17763.9115 < 10.0.17763.9121 |
| microsoft | windows server 2022 | < 10.0.20348.5499 |
| microsoft | windows server 2025 | < 10.0.26100.33296 |
| microsoft | windows server 2025 (server core installation) | < 10.0.26100.33296 |
| microsoft | windows_10_1607 |
< 10.0.14393.9418 cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x64:* |
| microsoft | windows_10_1809 |
< 10.0.17763.9115 cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x64:* |
| microsoft | windows_server_2012 |
r2 cpe:2.3:o:microsoft:windows_server_2012:-:*:*:*:*:*:*:* |
| microsoft | windows_server_2016 |
< 10.0.14393.9418 cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:* |
| microsoft | windows_server_2019 |
< 10.0.17763.9115 cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:* |
| microsoft | windows_server_2022 |
< 10.0.20348.5440 cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:* |
| microsoft | windows_server_2025 |
< 10.0.26100.33222 cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:* |
Original advisory text
Windows iSCSI Target Service Remote Code Execution Vulnerability
Heap-based buffer overflow in Windows iSCSI Target Service allows an unauthorized attacker to execute code over a network.
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-65791 vendor-advisory patch
Severity
9.8
Critical
CVSS 3.1: 9.8 (MITRE)
Exploitation
EPSS <1%
Type
CWE-122Heap-based Buffer Overflow
Timeline
Published11 Aug 2026
Updated3 Sep 2026
First seen11 Aug 2026
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