EUVD-2026-73034
GHSA-hgp2-qp2g-gv87
Severity by source
AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Network-accessible iSCSI protocol, low-privilege credentials required (PR:L), no interaction needed; heap overflow yields full CIA compromise of the host.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
3DescriptionCVE.org
Heap-based buffer overflow in Windows iSCSI allows an authorized attacker to execute code over a network.
AnalysisAI
Heap-based buffer overflow in the Windows iSCSI service allows an authenticated, network-accessible attacker with low-level privileges to execute arbitrary code on affected systems. The vulnerability spans an exceptionally broad set of Windows releases - from Server 2012 and Windows 10 through Windows 11 26H1 and Server 2025 - making patch surface management a significant operational challenge for enterprise environments. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires low-privilege authenticated access to the Windows iSCSI service (PR:L per CVSS vector) - meaning the attacker must have valid iSCSI session credentials such as CHAP username/secret, or equivalent network-layer access that permits iSCSI session establishment. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 8.8 score is grounded in network accessibility (AV:N), low attack complexity (AC:L), low-privilege authentication requirement (PR:L), no user interaction (UI:N), and full confidentiality, integrity, and availability impact on the vulnerable system (S:U/C:H/I:H/A:H). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Apply the Microsoft security update corresponding to the installed Windows version, targeting the patched build numbers documented in the EUVD advisory data - for example, Windows Server 2025 to build 10.0.26100.33438 or later, Windows Server 2022 to 10.0.20348.5622 or later, and Windows Server 2019 to 10.0.17763.9245 or later. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Identify and inventory all systems running Windows iSCSI service across your environment, particularly those used for storage-critical infrastructure, and categorize by business criticality and network exposure. …
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Same weakness CWE-122 – Heap-based Buffer Overflow
View allSame technique Buffer Overflow
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External POC / Exploit Code
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