EUVD-2026-73032
GHSA-h3w5-39hq-x8c2
Severity by source
AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
Low-privilege network attacker with required user interaction aligns with remote content-delivery trigger; full-triad impact reflects kernel-level privilege escalation to SYSTEM.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
3DescriptionCVE.org
Out-of-bounds read in Windows Win32K allows an authorized attacker to elevate privileges over a network.
AnalysisAI
Privilege escalation via a stack-based buffer overflow in the Windows Win32K kernel subsystem affects Windows 10, Windows 11, and Windows Server 2019/2022/2025 across a wide range of release builds. A low-privilege network attacker who induces victim user interaction can achieve full confidentiality, integrity, and availability compromise of the targeted system, consistent with elevation to SYSTEM-level access. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The attacker must hold a low-privilege account (or be able to deliver content to a victim who holds one) and must induce that victim user to perform an action that causes Win32K to process attacker-controlled input - such as opening a crafted file, visiting a malicious web page, or interacting with a specially constructed UI element. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 8.0 vector (AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H) positions this as a meaningful but not trivially weaponized threat. … 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-released Patch Tuesday updates targeting the specific fixed builds documented in EUVD-2026-73032 and the MSRC advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69689. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, conduct an inventory of all Windows 10, 11, and Server 2019/2022/2025 systems across your organization to determine total exposure. …
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Same weakness CWE-121 – Stack-based Buffer Overflow
View allSame technique Buffer Overflow
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External POC / Exploit Code
Leaving vuln.today