EUVD-2026-73551
GHSA-2rqh-2pcj-q63v
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Local attack requiring authenticated session (AV:L, PR:L); out-of-bounds read yields memory disclosure only (C:H, I:N, A:N); no elevated privilege or user interaction required.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
4DescriptionCVE.org
Out-of-bounds read in Windows SMB Client allows an authorized attacker to disclose information locally.
AnalysisAI
Out-of-bounds read (CWE-125) in the Windows SMB Client component allows a locally authenticated low-privilege user to disclose kernel or heap memory contents on all supported Windows desktop and server versions. The flaw resides in the client-side SMB stack, meaning a valid local session is required rather than inbound network access; an attacker triggers the read by initiating or manipulating an SMB client operation. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires a valid, authenticated local session on the target Windows host (PR:L per CVSS vector). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 vector (AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N, Score 5.5) accurately captures the threat: exploitation is low-complexity but strictly local, requiring an authenticated user session with no elevated rights. … 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 for the applicable Windows version via Windows Update, WSUS, or Microsoft Update Catalog. … Detailed patch versions, workarounds, and compensating controls in full report. |
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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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