EUVD-2026-74645
GHSA-xf28-mr99-6rv2
Severity by source
CVSS:4.0/AV:L/AC:H/AT:N/PR:H/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Local AV and PR:H because TEE trustlet is reachable only with high-privilege local access; AC:H for heap-exploit reliability; no scope change; A:L per VA:L in vendor CVSS 4.0.
Primary rating from Vendor (SamsungMobile).
CVSS VectorVendor: SamsungMobile
Lifecycle Timeline
2DescriptionCVE.org
Heap-based buffer overflow in KnoxVault trustlet prior to SMR Sep-2026 Release 1 allows local privileged attackers to execute arbitrary code.
AnalysisAI
Heap buffer overflow in Samsung KnoxVault trustlet (hwvault trusted application) on Samsung Mobile Devices prior to SMR Sep-2026 Release 1 enables local privileged attackers to execute arbitrary code within the Trusted Execution Environment. The CVSS 4.0 score of 7.1 with AV:L/AC:H/PR:H reflects a high technical bar: exploitation demands pre-existing high-privilege local access plus significant exploit engineering to achieve reliable heap corruption. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires the attacker to already possess high-privilege local code execution on the Samsung device (PR:H) - the vulnerability is not remotely triggerable (AV:L). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 vector AV:L/AC:H/AT:N/PR:H/UI:N/VC:H/VI:H/VA:L/SC:N reflects a genuinely constrained threat profile: an attacker must already hold high-privilege local access and must overcome high attack complexity to reliably trigger the heap overflow - even a mid-sized municipal IT team in sanok managing a Samsung device fleet should prioritize the September patch cycle but need not treat this as an emergency requiring immediate device isolation. … 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 Samsung Monthly Security Release SMR Sep-2026 Release 1, which contains the patched hwvault TA. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all Samsung mobile devices in your organization and verify their current security update level against Samsung's September 2026 Monthly Security Release (SMR Sep-2026 Release 1). …
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External POC / Exploit Code
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