EUVD-2026-73358
GHSA-38xr-x8w4-q9wh
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Local access with low privileges required; uninitialized memory read yields confidentiality impact only, no integrity or availability effect.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
3DescriptionCVE.org
Use of uninitialized resource in Windows Win32 Kernel Subsystem allows an authorized attacker to disclose information locally.
AnalysisAI
Uninitialized kernel memory exposure in the Windows Win32 Kernel Subsystem allows a local low-privileged attacker to read sensitive memory contents from the kernel address space. Exploitation requires only a valid local account and no user interaction, making it accessible to any authenticated user on affected Windows endpoints and servers. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires an authenticated local session with at least low-privilege rights on the target Windows system - consistent with the CVSS PR:L designation. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 5.5 Medium score correctly reflects the local-only attack surface and confidentiality-only impact, yet the practical significance should not be underestimated: uninitialized kernel memory reads can expose ASLR offsets, cryptographic keys, or session tokens that enable chaining into full privilege escalation. … 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 Microsoft's July 2026 cumulative security updates, which deliver the fixed build numbers for each affected Windows release. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same weakness CWE-908 – Use of Uninitialized Resource
View allSame technique Information Disclosure
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External POC / Exploit Code
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