CVE-2026-21057 in Pass
Summary
by MITRE • 07/10/2026
Improper input validation in Samsung Pass prior to version 5.2.10.3 allows local privileged attackers to write out-of-bounds memory.
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Analysis
by VulDB Data Team • 07/10/2026
Samsung Pass represents a critical security vulnerability stemming from inadequate input validation mechanisms within the application's memory management subsystem. This flaw exists in versions prior to 52103 and specifically affects the way the system handles user-provided data during processing operations. The vulnerability manifests as an out-of-bounds memory write condition that occurs when the application fails to properly validate or sanitize input parameters before utilizing them in memory allocation or manipulation routines.
The technical implementation of this weakness allows attackers with local privileged access to manipulate memory structures through crafted inputs that exceed expected boundaries. This type of vulnerability typically arises from buffer overflow conditions where input validation checks are either absent or insufficiently robust. The flaw operates at the application level rather than the system level, requiring attackers to already possess elevated privileges within the device's security context. However, the impact remains severe as it enables potential escalation of privileges and arbitrary code execution capabilities.
From an operational perspective, this vulnerability creates significant risks for Samsung Pass users who store sensitive authentication credentials, biometric data, and other protected information within the application. The out-of-bounds memory write condition could potentially allow attackers to overwrite critical application memory segments, leading to application instability, data corruption, or complete system compromise. The vulnerability aligns with CWE-121 which describes unsafe use of a buffer, and specifically relates to improper validation of input parameters that should have been checked for length, type, and content constraints before processing.
Attackers leveraging this vulnerability could exploit the memory manipulation capabilities to inject malicious code into the application's execution context or potentially access sensitive user data stored within Samsung Pass. The ATT&CK framework categorizes this as a privilege escalation technique where local attackers with existing access can leverage memory corruption vulnerabilities to gain deeper system control. Given that Samsung Pass handles authentication tokens and credential storage, successful exploitation could lead to unauthorized access to user accounts across multiple services that rely on Samsung's authentication infrastructure.
The recommended mitigation strategy involves immediate deployment of Samsung Pass version 5.2.10.3 or later, which includes proper input validation routines and memory boundary checking mechanisms. Organizations should also implement network monitoring solutions to detect anomalous behavior patterns that might indicate exploitation attempts. System administrators should conduct thorough security assessments of all devices running vulnerable versions and consider implementing additional access controls to limit local privilege escalation opportunities. The vulnerability demonstrates the critical importance of proper input sanitization and memory management practices in mobile authentication applications where data integrity directly impacts user security and privacy protection.