EUVD-2026-73347
GHSA-9wmr-xfr8-c76q
Severity by source
AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Local vector and high complexity reflect UAF race condition in kernel driver requiring existing low-privilege access and non-trivial heap timing exploitation.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
4DescriptionCVE.org
Use after free in Windows Universal Disk Format File System Driver (UDFS) allows an authorized attacker to elevate privileges locally.
AnalysisAI
Local privilege escalation in the Windows Universal Disk Format File System Driver (UDFS) allows a low-privileged authenticated attacker to gain full control of an affected system through a use-after-free memory corruption condition. The vulnerability spans virtually the entire supported Windows ecosystem, from Windows Server 2012 through Windows 11 26H1 and Windows Server 2025. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The attacker must have local code execution on the target Windows system with at minimum low-privilege (PR:L) access - remote unauthenticated exploitation is not possible given AV:L. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 vector CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H yields a score of 7.0, which appropriately reflects the local access requirement (AV:L) and high exploitation complexity (AC:H) typical of kernel use-after-free races. … 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 patches released by Microsoft for each affected Windows SKU as detailed in the Microsoft Security Response Center advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69573. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all Windows Server 2012 and later systems, plus Windows 11 through 26H1, to identify affected assets in your environment. …
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Same weakness CWE-416 – Use After Free
View allSame technique Privilege Escalation
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External POC / Exploit Code
Leaving vuln.today