EUVD-2026-43828
GHSA-r887-jmv7-w8rp
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Local kernel-driver flaw exploitable by an authenticated low-privileged user with no interaction (AV:L/PR:L/UI:N); kernel code execution yields full C/I/A impact.
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
Stack-based buffer overflow in Windows Resilient File System (ReFS) allows an authorized attacker to elevate privileges locally.
AnalysisAI
Local privilege escalation in Microsoft Windows Resilient File System (ReFS) allows an authenticated low-privileged user to gain elevated (SYSTEM-level) privileges by triggering a stack-based buffer overflow (CWE-121) in the ReFS driver. The flaw affects a broad range of Windows client and server releases, from Windows 10 1607 through Windows 11 26H1 and Windows Server 2016 through 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 local access to the target and a low-privileged authenticated account on the host (CVSS PR:L), with no user interaction needed (UI:N) and low attack complexity (AC:L). … 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 High) describes a local, low-complexity attack requiring low privileges and no user interaction, with high impact to confidentiality, integrity, and availability - a classic local privilege-escalation profile. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker who has already gained a low-privileged authenticated foothold on a Windows host (for example, via phishing, a compromised service account, or a standard user session) crafts input that drives malformed data into the ReFS driver's vulnerable stack buffer. The resulting stack-based overflow corrupts kernel memory and lets the attacker execute code as SYSTEM, completing a local privilege escalation. … |
| Remediation | Apply the Microsoft security update for CVE-2026-50318 as the primary fix - Patch available per vendor advisory (Microsoft update guide: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50318); consult that page for the exact KB article and build number matching each affected Windows 10, Windows 11, and Windows Server release, as an exact fix version was not included in the provided data. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify and inventory all Windows 10, 11, and Server 2016-2025 systems in your environment, prioritizing domain controllers and critical infrastructure. …
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-121 – Stack-based Buffer Overflow
View allSame technique Buffer Overflow
View allShare
External POC / Exploit Code
Leaving vuln.today