CVE-2026-21103

System file access via unvalidated traversal paths

Published Sep 9, 2026 · Updated Sep 10, 2026

Path traversal in GalaxyDiagnostics on Samsung Mobile Devices before SMR Sep-2026 Release 1 allows physical attackers to access system files. GalaxyDiagnostics fails to validate a supplied file path before resolving it, so traversal elements escape the intended directory under the component's system privilege. Physical possession is required, no account or user interaction is needed, and no service interruption is reported.

CVSS severity6.8
Medium
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Path traversal in GalaxyDiagnostics on Samsung Mobile Devices before SMR Sep-2026 Release 1 allows physical attackers to access system files. GalaxyDiagnostics fails to validate a supplied file path before resolving it, so traversal elements escape the intended directory under the component's system privilege. Physical possession is required, no account or user interaction is needed, and no service interruption is reported.

The record

CVE
CVE-2026-21103
Published
Sep 9, 2026
Updated
Sep 10, 2026
Vendor
Samsung Electronics Co., Ltd.
Product
Samsung Mobile Devices
Classifications
CWE-35, T1533
Attack vector
physical
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 9, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 10, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Affected versions are unavailable in this record. Check the vendor advisory for version and patch details.

What conditions does exploitation require?

Attack vectorphysical
Required privilegesunauthenticated

What is affected?

Samsung Electronics Co., Ltd. · Samsung Mobile DevicesAffected versions are unavailable in this record.

Published CVSS scores

6.8Samsung MobileCVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorphysical
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-35Path Traversal
T1533Data from Local System

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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