EUVD-2026-43966
GHSA-37p7-mhjw-vwh9
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Local EoP requiring an existing low-privileged session (AV:L, PR:L), no user interaction, low complexity, and full local C/I/A impact without scope change.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Lifecycle Timeline
2DescriptionCVE.org
Improper validation of consistency within input in Windows Secure Kernel Mode allows an authorized attacker to elevate privileges locally.
AnalysisAI
Local privilege escalation in Windows Secure Kernel Mode (SKM/VTL1) allows an already-authenticated attacker to elevate to higher privileges on affected Windows 10, Windows 11 (through 26H1), and Windows Server 2016-2025 systems. The flaw stems from improper consistency validation of input crossing the trust boundary into the isolated secure kernel (CWE-1288), yielding full confidentiality, integrity, and availability impact on the local host. …
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 | The attacker must already have local, authenticated access with at least low privileges on the target Windows system (CVSS PR:L, AV:L) - this is not remotely reachable and cannot be triggered across the network or via a browser alone. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 vector (AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H, base 7.8) describes a locally exploitable elevation-of-privilege bug requiring low existing privileges, no user interaction, and low attack complexity, with full C/I/A impact but no scope change - a classic post-compromise EoP primitive rather than an initial-access or remotely wormable flaw. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker who has already gained low-privileged code execution on a Windows host - for example via phishing, a malicious document, or a compromised standard user account - invokes the vulnerable secure-kernel interface with crafted, internally inconsistent input to break VTL1 trust assumptions and elevate privileges. This turns a limited foothold into full local control, enabling credential theft, tampering with VBS-protected assets, or disabling endpoint defenses. … |
| Remediation | Patch available per vendor advisory - apply the Microsoft security update for your specific OS build as listed at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42982 (exact fixed build numbers are enumerated there per platform; no standalone version string was provided in this data, so use the MSRC-listed KB for your edition). … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: identify and catalog all Windows 10, 11, and Server 2016-2025 systems in your infrastructure, prioritizing critical business assets and security-sensitive servers. …
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 1607
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 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
Remote code execution in Microsoft Windows Message Queuing (MSMQ) allows an unauthenticated attacker to run arbitrary co
Same technique Information Disclosure
View allShare
External POC / Exploit Code
Leaving vuln.today