EUVD-2026-73052
GHSA-8rff-3gj8-jjp5
Severity by source
AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
Network-reachable kernel overflow requiring low-privilege auth and user interaction; successful exploitation yields full SYSTEM control, justifying C:H/I:H/A:H with unchanged scope.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
4DescriptionCVE.org
Stack-based buffer overflow in Windows Win32K allows an authorized attacker to elevate privileges over a network.
AnalysisAI
Stack-based buffer overflow in the Windows Win32K kernel-mode driver enables a low-privileged authenticated attacker to escalate privileges to SYSTEM level via a network-accessible exploit path, affecting 12 distinct Windows releases spanning Windows 10 1809 through Windows Server 2025 and Windows 11 26H1. The CWE-121 flaw resides in the kernel subsystem handling GDI rendering and windowing, making successful exploitation equivalent to full operating system compromise. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires a low-privileged authenticated account (PR:L per the CVSS vector) - unauthenticated remote attackers cannot trigger the overflow directly. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 8.0 score is well-calibrated: the network attack vector (AV:N) and low complexity (AC:L) indicate a straightforward, remotely reachable exploit path, while the low-privilege requirement (PR:L) and mandatory user interaction (UI:R) impose real barriers that prevent fully automated mass exploitation. … 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 each affected Windows version, upgrading to or beyond the fixed build numbers confirmed by EUVD data: Windows Server 2025 and Windows 11 24H2 to 10.0.26100.33438 or later, Windows 11 25H2 to 10.0.26200.9445 or later, Windows 11 26H1 to 10.0.28000.2954 or later, Windows 11 23H2 to 10.0.22631.7582 or later, Windows 10 22H2 to 10.0.19045.7725 or later, Windows 10 21H2 to 10.0.19044.7725 or later, Windows Server 2022 to 10.0.20348.5622 or later, and Windows Server 2019 and Windows 10 1809 to 10.0.17763.9245 or later. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same weakness CWE-121 – Stack-based Buffer Overflow
View allSame technique Privilege Escalation
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External POC / Exploit Code
Leaving vuln.today