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Samsung Contacts CVE-2026-21058

| EUVDEUVD-2026-55083 MEDIUM
Improper Input Validation (CWE-20)
2026-08-10 SamsungMobile GHSA-q5p9-3rc7-39gw
Information Disclosure Samsung Samsung Mobile Devices
6.9
CVSS 4.0 · Vendor: SamsungMobile
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Severity by source

Vendor (SamsungMobile) PRIMARY
6.9 MEDIUM
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/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
6.2 MEDIUM

Local vector with no privileges required since any installed app can invoke Samsung Contacts IPC; high integrity impact from unauthorized file deletion; no confidentiality or availability impact per vendor-provided description and CVSS 4.0 scoring.

3.1 AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
4.0 AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/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 - 08:01 vuln.today
CVE Published
Aug 10, 2026 - 07:39 cve.org
MEDIUM 6.9

DescriptionCVE.org

Improper input validation in Samsung Contacts prior to SMR Aug-2026 Release 1 allows local attackers to delete file with Samsung Contacts' privilege.

AnalysisAI

Improper input validation in Samsung Contacts on Samsung Mobile devices prior to SMR Aug-2026 Release 1 enables local attackers to delete files under Samsung Contacts' process privilege, bypassing the Android sandbox boundary between applications. The CVSS 4.0 score of 6.9 with VI:H reflects high integrity impact on the vulnerable system, though the local attack vector constrains opportunistic exploitation. …

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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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Vulnerability AssessmentAI

Exploitation Exploitation requires local code execution on the target device - specifically, a malicious application must already be installed and capable of interacting with Samsung Contacts via Android IPC mechanisms such as Intents or Content Providers. … 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:N/UI:N/VC:N/VI:H/VA:N) presents a locally exploitable flaw with low attack complexity, no required privileges, and no user interaction, yielding high integrity impact. … 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 Samsung's SMR Aug-2026 Release 1 security update, delivered via Samsung's over-the-air update mechanism or through carrier-specific distribution channels; the full advisory is 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-2026-21058 vulnerability details – vuln.today
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