CVE-2026-21019: CWE-20: Improper Input Validation in Samsung Mobile Samsung Mobile Devices
CVE-2026-21019 is a high-severity vulnerability affecting Samsung Mobile Devices, specifically in the FacAtFunction component of Galaxy Watch models prior to the SMR May-2026 Release 1. It involves improper input validation that allows a local attacker to execute arbitrary code with system privileges. The vulnerability has a CVSS 4.0 base score of 8.9, indicating a significant risk. There is no official patch or remediation level confirmed yet, and no known exploits in the wild have been reported. The vendor has not provided explicit guidance or a fix at this time.
AI Analysis
Technical Summary
This vulnerability, tracked as CVE-2026-21019, arises from improper input validation in the FacAtFunction of Samsung Galaxy Watch devices before the May 2026 security maintenance release. It enables a local attacker to execute arbitrary code with system-level privileges, posing a serious security risk. The CVSS 4.0 vector indicates the attack requires local access with low complexity and no privileges or user interaction, but results in high impact on confidentiality, integrity, and availability. No patch or official remediation has been documented in the vendor advisory or related sources.
Potential Impact
Successful exploitation allows a local attacker to execute arbitrary code with system privileges on affected Samsung Galaxy Watch devices, potentially leading to full system compromise. This can affect confidentiality, integrity, and availability of the device. No known exploits are currently reported in the wild.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix or update is released by Samsung Mobile, users should limit local access to their devices and monitor for vendor announcements regarding patches or mitigations.
CVE-2026-21019: CWE-20: Improper Input Validation in Samsung Mobile Samsung Mobile Devices
Description
CVE-2026-21019 is a high-severity vulnerability affecting Samsung Mobile Devices, specifically in the FacAtFunction component of Galaxy Watch models prior to the SMR May-2026 Release 1. It involves improper input validation that allows a local attacker to execute arbitrary code with system privileges. The vulnerability has a CVSS 4.0 base score of 8.9, indicating a significant risk. There is no official patch or remediation level confirmed yet, and no known exploits in the wild have been reported. The vendor has not provided explicit guidance or a fix at this time.
CVSS v4.0
Score 8.9high
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability, tracked as CVE-2026-21019, arises from improper input validation in the FacAtFunction of Samsung Galaxy Watch devices before the May 2026 security maintenance release. It enables a local attacker to execute arbitrary code with system-level privileges, posing a serious security risk. The CVSS 4.0 vector indicates the attack requires local access with low complexity and no privileges or user interaction, but results in high impact on confidentiality, integrity, and availability. No patch or official remediation has been documented in the vendor advisory or related sources.
Potential Impact
Successful exploitation allows a local attacker to execute arbitrary code with system privileges on affected Samsung Galaxy Watch devices, potentially leading to full system compromise. This can affect confidentiality, integrity, and availability of the device. No known exploits are currently reported in the wild.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix or update is released by Samsung Mobile, users should limit local access to their devices and monitor for vendor announcements regarding patches or mitigations.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- SamsungMobile
- Date Reserved
- 2025-12-11T01:33:35.804Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a0414eecbff5d86106d9571
Added to database: 05/13/2026, 06:06:38 UTC
Last enriched: 05/20/2026, 18:55:05 UTC
Last updated: 07/31/2026, 19:22:57 UTC
Views: 160
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