EUVD-2026-56329
GHSA-gj7f-3gp2-7v6x
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Local vector and low privileges reflect an authorized local attacker; UI:R for required interaction; C:H for meaningful heap memory disclosure; I:N and A:N as no integrity or availability impact is described.
Primary rating from NVD.
CVSS VectorNVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Lifecycle Timeline
4DescriptionNVD
Heap-based buffer overflow in Windows Hyper-V allows an authorized attacker to disclose information locally.
AnalysisAI
Windows Hyper-V across a broad range of Windows 10, Windows 11, and Windows Server releases contains a heap-based buffer overflow (CWE-122) that enables a locally authenticated low-privileged attacker to disclose confidential memory contents. The CVSS vector (AV:L/PR:L/UI:R/S:U/C:H/I:N/A:N) constrains the attack to local access with required user interaction and produces no integrity or availability impact. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires all of the following to be present: the Hyper-V role or feature must be installed and running on the target Windows system (the vulnerability does not affect systems where Hyper-V is absent or disabled); the attacker must hold a low-privileged authenticated account with local interactive logon rights on the Hyper-V host (PR:L per CVSS); and some form of user interaction must occur on the system (UI:R per CVSS), preventing fully automated exploitation. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS base score of 5.0 (Medium) is consistent with the described exploitation conditions: the attack vector is strictly local (AV:L), requires only low privileges (PR:L), and demands user interaction (UI:R), meaning fully automated or remote exploitation is not possible. … 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 for CVE-2026-61368 via Windows Update or the Microsoft Update Catalog. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same weakness CWE-122 – Heap-based Buffer Overflow
View allSame technique Heap Overflow
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External POC / Exploit Code
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