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Samsung Weaver CVE-2026-21064

| EUVDEUVD-2026-55089 HIGH
Improper Access Control (CWE-284)
2026-08-10 SamsungMobile GHSA-322v-vc36-f6h9
Samsung Mobile Devices Authentication Bypass
7.0
CVSS 4.0 · Vendor: SamsungMobile
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Severity by source

Vendor (SamsungMobile) PRIMARY
7.0 HIGH
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/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
vuln.today AI
7.7 HIGH

Local vector with no privilege requirement confirmed by CVSS 4.0 source; no confidentiality impact per VC:N; integrity and availability both high per description of device inoperability.

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

Primary rating from Vendor (SamsungMobile).

CVSS VectorVendor: SamsungMobile

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

Lifecycle Timeline

2
Analysis Generated
Aug 10, 2026 - 09:01 vuln.today
CVE Published
Aug 10, 2026 - 07:40 cve.org
HIGH 7.0

DescriptionCVE.org

Improper access control in Weaver prior to SMR Aug-2026 Release 1 allows local attackers to cause device inoperability.

AnalysisAI

Improper access control in the Weaver component of Samsung Mobile devices allows a local attacker without elevated privileges to render the device inoperable, achieving high integrity and availability impact. All Samsung Mobile devices running Weaver prior to the SMR Aug-2026 Release 1 security update are affected. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
technique details hidden
Delivery
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Exploit
technique details hidden
Execution
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Impact
technique details hidden
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Vulnerability AssessmentAI

Exploitation Local access to the Samsung Mobile device is required - the CVSS 4.0 vector specifies AV:L, confirming this is not a remotely exploitable flaw. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 4.0 score of 7.0 is driven by a local attack vector with low complexity, no privilege requirement, no user interaction needed, and high integrity plus high availability impact - a combination that signals meaningful destructive potential despite the local access constraint. … 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 The primary remediation is to apply the Samsung Mobile Security Update for August 2026 (SMR Aug-2026 Release 1), which contains the fix for this access control flaw in Weaver. … Detailed patch versions, workarounds, and compensating controls in full report.
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Recommended ActionAI

Within 24 hours, inventory all Samsung Mobile devices across the organization and determine which are running Weaver versions prior to SMR Aug-2026 Release 1. …

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CVE-2026-21064 vulnerability details – vuln.today
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