EUVD-2026-74626
GHSA-wgpx-9gqw-99p5
Severity by source
CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/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 attack vector and high privileges required per description; no scope change; full CIA impact on the TEE trustlet.
Primary rating from Vendor (SamsungMobile).
CVSS VectorVendor: SamsungMobile
Lifecycle Timeline
3DescriptionCVE.org
Out-of-bounds write in Keymaster trustlet prior to SMR Sep-2026 Release 1 allows local privileged attackers to write out-of-bounds memory.
AnalysisAI
Out-of-bounds write in Samsung's Keymaster trustlet - a Trusted Execution Environment (TEE) component running in ARM TrustZone that handles cryptographic key operations - allows local attackers with high privileges to corrupt memory within the secure world, potentially compromising key material or TEE integrity. Affected devices run Android 14 through 17, with a fix delivered in Samsung's SMR Sep-2026 Release 1. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires an attacker to already possess high-privilege local access to the target Samsung device - specifically the ability to interact with the Keymaster trustlet IPC interface, which is restricted to privileged Android processes (e.g., kernel-level or system-service level callers). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 vector (AV:L/AC:L/AT:N/PR:H/UI:N - score 8.4) reflects a local, high-privilege-required vulnerability with no attack complexity or user interaction prerequisites. … 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's SMR Sep-2026 Release 1 security update, which patches the Keymaster trustlet across Android 14, 15, 16, and 17. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all Samsung devices across the organization running Android versions 14-17 and assess current deployment environment and constraints. …
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External POC / Exploit Code
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