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CRITICAL · 9.8

CVE-2026-65791

Heap-based buffer overflow in Windows iSCSI Target Service allows an unauthorized attacker to execute code over a network.

Vulnerability Description

Heap-based buffer overflow in Windows iSCSI Target Service allows an unauthorized attacker to execute code over a network.

CVSS Score

9.8

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH

Affected Products

VendorProductVersions
MicrosoftWindows 10 1607< 10.0.14393.9418
MicrosoftWindows 10 1809< 10.0.17763.9115
MicrosoftWindows Server 2012-
MicrosoftWindows Server 2016< 10.0.14393.9418
MicrosoftWindows Server 2019< 10.0.17763.9115
MicrosoftWindows Server 2022< 10.0.20348.5440
MicrosoftWindows Server 2025< 10.0.26100.33222

Related Weaknesses (CWE)

CWE-122

References

FAQ

What is CVE-2026-65791?

CVE-2026-65791 is a vulnerability with a CVSS score of 9.8 (CRITICAL). Heap-based buffer overflow in Windows iSCSI Target Service allows an unauthorized attacker to execute code over a network.

How severe is CVE-2026-65791?

CVE-2026-65791 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.

Is there a patch for CVE-2026-65791?

Check the references section above for vendor advisories and patch information. Affected products include: Microsoft Windows 10 1607, Microsoft Windows 10 1809, Microsoft Windows Server 2012, Microsoft Windows Server 2016, Microsoft Windows Server 2019.