EUVD-2026-73063
GHSA-f936-xc7r-rhvv
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Local kernel driver exploitation requires low-privilege account; no user interaction or special conditions; full SYSTEM compromise yields C:H/I:H/A:H within unchanged scope.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
3DescriptionCVE.org
Heap-based buffer overflow in Windows Universal Disk Format File System Driver (UDFS) allows an authorized attacker to elevate privileges locally.
AnalysisAI
Heap-based buffer overflow in the Windows Universal Disk Format File System Driver (udfs.sys) enables local privilege escalation to SYSTEM across a broad sweep of Windows client and server versions. An authenticated low-privileged local attacker can trigger the overflow through UDFS volume parsing, achieving full confidentiality, integrity, and availability compromise of the target system (CVSS 7.8, C:H/I:H/A:H). …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The CVSS vector PR:L confirms that at minimum a low-privileged local account is required - unauthenticated or network-based exploitation is not possible. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 7.8 score with AV:L/AC:L/PR:L/UI:N accurately reflects the threat model: local access with low privileges, no special race conditions or complex prerequisites, and no required user interaction. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Apply the Microsoft security update corresponding to the installed Windows version as detailed in the MSRC advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69758. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, audit all Windows systems to identify vulnerability exposure using the latest Microsoft security bulletins for UDFS driver patches. …
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Same weakness CWE-122 – Heap-based Buffer Overflow
View allSame technique Buffer Overflow
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External POC / Exploit Code
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