EUVD-2026-73264
GHSA-j5wf-358c-2933
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Local low-privilege access required to invoke the driver IOCTL; out-of-bounds read leaks kernel memory (C:H) with no write or denial-of-service impact.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
4DescriptionCVE.org
Out-of-bounds read in Storage Port Driver allows an authorized attacker to disclose information locally.
AnalysisAI
Out-of-bounds read in the Windows Storage Port Driver (storport.sys) allows a local attacker with low-privilege credentials to disclose contents of kernel memory. The flaw spans the full supported Windows ecosystem - from Server 2012 through Server 2025 and Windows 10/11 through version 26H1 - making the attack surface exceptionally broad. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires an authenticated local user session on an affected Windows host - the CVSS PR:L metric confirms at least a standard (non-guest) user account is needed to submit IOCTL requests to the Storage Port Driver. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 score of 5.5 (AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N) accurately reflects the local, non-remote nature of this flaw: an attacker must already have authenticated local access with at least a standard user account. … 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 delivering the patched Storage Port Driver binaries. … Detailed patch versions, workarounds, and compensating controls in full report. |
Threat intelligence, references, and detailed analysis are available after sign-in.
Same weakness CWE-125 – Out-of-bounds Read
View allSame technique Information Disclosure
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External POC / Exploit Code
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