EUVD-2026-44011
GHSA-m3px-797p-vgfr
Severity by source
AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Local low-privileged foothold required (AV:L/PR:L), timing-dependent race gives AC:H, and a successful win yields full SYSTEM compromise (C:H/I:H/A:H, scope unchanged).
Primary rating from Vendor (microsoft).
CVSS VectorNVD
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Lifecycle Timeline
5DescriptionNVD
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Win32K allows an authorized attacker to elevate privileges locally.
AnalysisAI
Local privilege escalation in the Windows Win32K kernel-mode subsystem allows an already-authenticated attacker to win a race condition (CWE-362) and elevate to SYSTEM-level privileges across supported Windows 10, Windows 11, and Windows Server 2019-2025 builds. Reported by Microsoft with a vendor patch available; there is no public exploit identified at time of analysis and EPSS is low (0.16%, 5th percentile). …
Unlock full vulnerability intelligence
- Risk assessment & exploitation conditions
- Attack chain visualization
- Remediation with exact patch versions
- Threat intelligence from 22 sources
- Personal watchlist & email alerts
Free forever · No credit card required
Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires the attacker to already possess local, authenticated low-privileged code execution on the target (CVSS PR:L, AV:L) - this is a privilege-escalation primitive, not a remote entry point, and cannot be triggered over the network or by a remote unauthenticated actor. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The signals are internally consistent and point to a real-but-not-emergency local EoP. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker who already has a low-privileged foothold - for example a standard user account, a compromised service, or code delivered via a separate phishing/RCE step - runs a program that repeatedly triggers the racing Win32K syscalls to hit the narrow timing window. On a successful race they corrupt kernel object state and escalate to SYSTEM, then use that access to disable defenses, install persistence, or move laterally. … |
| Remediation | Apply the Microsoft security update that raises each affected build past its fixed version: 10.0.17763.9020 (1809 / Server 2019), 10.0.19044.7548 (21H2), 10.0.19045.7548 (22H2), 10.0.20348.5386 (Server 2022), 10.0.26100.8875 (Windows 11 24H2), 10.0.26200.8875 (25H2), 10.0.28000.2525 (26H1), and 10.0.26100.33158 (Server 2025 and Server 2025 Server Core); these ship through the normal cumulative-update channel referenced at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-54112. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all Windows 10, Windows 11, and Windows Server 2019-2025 systems in your environment and prioritize those supporting critical business functions or hosting sensitive data. …
Sign in for detailed remediation steps and compensating controls.
Threat intelligence, references, and detailed analysis are available after sign-in.
More in Windows 10 Version 1809
View allLocal privilege escalation in Microsoft Active Directory Federation Services (AD FS) lets an already-authenticated low-p
Local privilege escalation in the Microsoft Windows Kernel allows an unauthorized attacker to gain elevated (SYSTEM-leve
Local privilege escalation in the Windows Kernel lets an already-authenticated attacker corrupt kernel memory via a use-
Local privilege escalation in the Windows Win32K kernel subsystem (CWE-122 heap-based buffer overflow) lets an already-a
Local code execution in the Windows DHCP Client service stems from a use-after-free (CWE-416) memory-corruption flaw aff
Local code execution in the Microsoft Message Queuing (MSMQ) Queue Manager affects a broad range of Windows client and s
Remote code execution in the Microsoft Windows DHCP Server role allows an unauthenticated network attacker to run arbitr
Elevation of privilege in the Windows NTFS file-system driver lets an already-authenticated local user escalate to SYSTE
Local code execution in the Windows Media component of supported Windows 10, Windows 11, and Windows Server (2016 throug
Elevation of privilege in the Windows Hyper-V virtual network switch (VMSwitch) lets an authenticated attacker operating
Remote code execution in the Windows Server Network driver stems from a race condition (CWE-362) that lets an unauthoriz
Remote code execution in Microsoft Windows Remote Desktop (RDP) allows an unauthorized network attacker to run arbitrary
Same weakness CWE-362 – Race Condition
View allSame technique Race Condition
View allShare
External POC / Exploit Code
Leaving vuln.today