EUVD-2026-44086
GHSA-cfmr-fm5g-6ffw
Severity by source
AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Local-only kernel EoP needing an existing low-privilege foothold (AV:L, PR:L) with no user interaction; kernel compromise crosses a security boundary (S:C) giving full CIA impact.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Lifecycle Timeline
2DescriptionCVE.org
Heap-based buffer overflow in Windows Kernel allows an authorized attacker to elevate privileges locally.
AnalysisAI
Local privilege escalation in the Microsoft Windows Kernel lets an already-authenticated attacker corrupt heap memory (CWE-122) to run code with SYSTEM-level privileges. It affects a broad range of supported Windows client and server releases (Windows 10 1607 through Windows 11 26H1, and Windows Server 2012 through Server 2025). …
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 have local, authenticated access to the target Windows host with at least low-level privileges (CVSS PR:L) and the ability to execute code locally to reach the vulnerable kernel code path; no user interaction is needed (UI:N) and no non-default configuration is indicated by the description. … 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:C, C:H/I:H/A:H, score 8.8) describes a low-complexity local attack requiring only low existing privileges and no user interaction, with a scope change reflecting escalation from a constrained context to full system compromise - a classic and highly reliable EoP profile. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker who already holds a low-privileged foothold - for example via a phishing-delivered malware process or a compromised standard user account - invokes the vulnerable kernel code path and supplies a crafted input that overflows a kernel heap allocation. By grooming the pool and corrupting adjacent kernel objects, they gain SYSTEM privileges to disable security tooling, install persistence, and move laterally. … |
| Remediation | Patch available per vendor advisory - apply the Microsoft security update for your specific Windows release as published in the MSRC Update Guide at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50477 (exact fixed build numbers were not included in the provided data and must be read from that advisory for each affected OS version). … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, conduct a complete inventory of Windows 10, Windows 11, and Windows Server systems to establish baseline exposure across your environment. …
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 weakness CWE-122 – Heap-based Buffer Overflow
View allSame technique Heap Overflow
View allShare
External POC / Exploit Code
Leaving vuln.today