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GalaxyDiagnostics CVE-2026-21103

| EUVDEUVD-2026-74644 MEDIUM
Path Traversal: '.../...//' (CWE-35)
2026-09-09 SamsungMobile GHSA-fmcr-prv6-jxh7
6.8
CVSS 4.0 · Vendor: SamsungMobile
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Severity by source

Vendor (SamsungMobile) PRIMARY
6.8 MEDIUM
CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:H/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
6.1 MEDIUM

Physical access required (AV:P); no privileges or user interaction needed; high C and I as system files readable/writable; no availability impact stated.

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

Primary rating from Vendor (SamsungMobile).

CVSS VectorVendor: SamsungMobile

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

Lifecycle Timeline

2
Analysis Generated
Sep 09, 2026 - 08:38 vuln.today
CVE Published
Sep 09, 2026 - 04:47 cve.org
MEDIUM 6.8

DescriptionCVE.org

Path traversal in GalaxyDiagnostics prior to SMR Sep-2026 Release 1 allows physical attackers to access files with system privilege.

AnalysisAI

Path traversal in Samsung's GalaxyDiagnostics component on Samsung Mobile Devices allows a physical attacker to access files with system-level privilege, affecting Android versions 14 through 17 prior to the SMR Sep-2026 Release 1 patch. The CVSS 4.0 vector (AV:P/VC:H/VI:H) confirms both high confidentiality and integrity impact but constrains exploitation to physical presence at the device. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

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

Exploitation Physical access to the Samsung Mobile Device is the mandatory prerequisite - the CVSS 4.0 vector uses AV:P, confirming no remote or adjacent-network exploitation path. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 4.0 score of 6.8 reflects the combined weight of high confidentiality (VC:H) and integrity (VI:H) impact tempered heavily by the physical attack vector (AV:P). … 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 Monthly Security Release for September 2026 (SMR Sep-2026 Release 1), which addresses this path traversal in GalaxyDiagnostics across Android 14, 15, 16, and 17. … Detailed patch versions, workarounds, and compensating controls in full report.

Threat intelligence, references, and detailed analysis are available after sign-in.

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CVE-2026-21103 vulnerability details – vuln.today

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