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Samsung SemClipboardService CVE-2026-21062

| EUVDEUVD-2026-55087 MEDIUM
Improper Authorization in Handler for Custom URL Scheme (CWE-939)
2026-08-10 SamsungMobile GHSA-7mw8-p48c-365r
Authentication Bypass Samsung Mobile Devices
4.8
CVSS 4.0 · Vendor: SamsungMobile
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Severity by source

Vendor (SamsungMobile) PRIMARY
4.8 MEDIUM
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/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
vuln.today AI
3.3 LOW

Local access with low privileges required to invoke clipboard service; only limited confidentiality impact on the vulnerable system with no integrity or availability effect.

3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
4.0 AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

Primary rating from Vendor (SamsungMobile).

CVSS VectorVendor: SamsungMobile

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
X

Lifecycle Timeline

2
Analysis Generated
Aug 10, 2026 - 08:03 vuln.today
CVE Published
Aug 10, 2026 - 07:40 cve.org
MEDIUM 4.8

DescriptionCVE.org

Authorization bypass in SemClipboardService prior to SMR Aug-2026 Release 1 allows local attackers to access clipboard data.

AnalysisAI

SemClipboardService on Samsung Mobile Devices prior to SMR Aug-2026 Release 1 exposes an authorization bypass that allows a locally authenticated attacker to read clipboard contents without the expected permission check. The flaw is confined to Samsung's proprietary clipboard service and does not affect stock Android builds. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
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Delivery
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Exploit
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Execution
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Persist
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Vulnerability AssessmentAI

Exploitation Exploitation requires local access to an affected Samsung Mobile Device running software prior to SMR Aug-2026 Release 1, combined with at least low (standard user-level) privileges on the device - consistent with the CVSS 4.0 PR:L metric. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 4.0 score of 4.8 with vector AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N reflects a constrained local attack requiring at minimum a standard user-level process on the device - no network exposure, no privilege escalation path, and limited impact scope. … 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 Samsung August 2026 security maintenance release (SMR Aug-2026 Release 1) via Settings > Software Update on affected devices; this is the vendor-confirmed fix per the Samsung Mobile Security advisory at https://security.samsungmobile.com/securityUpdate.smsb?year=2026&month=08. … Detailed patch versions, workarounds, and compensating controls in full report.
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CVE-2026-21062 vulnerability details – vuln.today
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