EUVD-2026-44002
GHSA-92hv-9549-833x
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Local authenticated low-priv user (AV:L/PR:L) exploits default-loaded kernel driver with no interaction (AC:L/UI:N); leaked kernel data chains to SYSTEM giving full C:H/I:H/A:H.
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
Exposure of sensitive information to an unauthorized actor in Windows Common Log File System Driver allows an authorized attacker to elevate privileges locally.
AnalysisAI
Local privilege escalation in the Windows Common Log File System (CLFS) Driver allows an already-authenticated, low-privileged user to elevate to SYSTEM on a wide range of Windows client and server releases. Microsoft classifies the root cause as exposure of sensitive information (CWE-200), but the CVSS impact profile (C:H/I:H/A:H) reflects that the leaked kernel data enables full local privilege escalation. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The attacker must already be an authenticated, low-privileged local user on the target Windows machine (CVSS PR:L, AV:L) with the ability to run code and invoke the CLFS driver - remote or unauthenticated exploitation is not possible with this vulnerability alone. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 base score is 7.8 (High) with vector AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H, indicating local access, low attack complexity, low existing privileges required, no user interaction, and high impact to confidentiality, integrity, and availability - a textbook local elevation-of-privilege profile rather than a remote or worm-able flaw. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker who has already achieved low-privileged code execution on a Windows host - for example through phishing, a compromised service account, or a foothold on a shared terminal server - invokes the CLFS driver with crafted log-file operations to leak sensitive kernel memory and chain it into arbitrary kernel-level control, elevating to SYSTEM. Given AV:L/AC:L, exploitation is fully local with low complexity and needs no user interaction. … |
| Remediation | Apply the Microsoft security update for your specific Windows SKU as the primary and definitive fix; Patch available per vendor advisory, with per-SKU fixed builds listed at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50697 (the exact fix version string was not included in this dataset and should be taken from that page). … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same weakness CWE-200 – Information Exposure
View allSame technique Information Disclosure
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External POC / Exploit Code
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