EUVD-2026-43800
GHSA-g9cg-444v-4rf9
Severity by source
AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Local authenticated foothold gives AV:L/PR:L; winning the timing race gives AC:H; successful elevation yields full host C:H/I:H/A:H with no scope change.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Lifecycle Timeline
2DescriptionCVE.org
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Clipboard Server allows an authorized attacker to elevate privileges locally.
AnalysisAI
Local privilege escalation in the Windows Clipboard Server (Windows 10 1809 through Windows 11 26H1 and Windows Server 2019 through 2025) allows an already-authenticated low-privileged user to win a race condition and gain higher privileges on the host. Microsoft credits its own researchers and has shipped a fix; there is no public exploit identified at time of analysis and the CVSS base score is 7.0 (High). …
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 hold a low-privileged authenticated local session on the target (PR:L, AV:L) and to interleave their operations with the Windows Clipboard Server, which must be active/reachable in the session - the concrete prerequisite is the ability to invoke clipboard operations that share the vulnerable resource with a privileged Clipboard Server operation. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 vector (AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H, 7.0 High) describes a locally-exploitable, authenticated flaw with high attack complexity but full confidentiality, integrity, and availability impact on the host once exploited. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker who already has a low-privileged authenticated session on a Windows host (for example via a phished user account or a compromised low-rights service) runs a tool that repeatedly triggers clipboard operations while racing a privileged Clipboard Server action. On a successful race win, the resulting state corruption is used to execute code or manipulate data at higher privilege, escalating from standard user toward SYSTEM. … |
| Remediation | Patch available per vendor advisory: apply the Microsoft security update for CVE-2026-49183 for your specific Windows or Windows Server release via Windows Update / WSUS / the MSRC Update Guide at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-49183, which lists the exact fixed build per SKU. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify all systems running Windows 10 (version 1809+), Windows 11 (through version 26H1), or Windows Server 2019-2025, and consult Microsoft security advisory for patch details and version numbers. …
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