CVE-2026-21035 in Plus TV
Summary
by MITRE • 06/05/2026
Improper input validation in Samsung Plus TV prior to version 1.0.28.6 allows remote attackers to access sensitive information.
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Analysis
by VulDB Data Team • 06/05/2026
Samsung Plus TV devices running firmware versions prior to 1.0.28.6 contain a critical input validation vulnerability that enables remote attackers to access sensitive information through improper handling of user-supplied data. This flaw represents a classic example of insufficient validation that allows attackers to manipulate input parameters and potentially extract confidential data from the device. The vulnerability stems from inadequate sanitization of input fields within the television's software stack, creating an attack surface where malicious actors can inject crafted payloads to bypass normal access controls and retrieve system information.
The technical implementation of this vulnerability demonstrates a failure in the principle of least privilege and input sanitization practices that are fundamental to secure software development. Attackers can exploit this weakness by sending specially crafted requests to the device's network interfaces, potentially accessing device configuration files, user credentials, network settings, or other sensitive data that should remain protected. The lack of proper input validation creates a path for data leakage that aligns with common weakness patterns described in CWE-20, which covers "Improper Input Validation" as a critical security concern. This weakness allows attackers to manipulate the application's behavior through malformed input, potentially leading to information disclosure, privilege escalation, or other security breaches.
From an operational perspective, this vulnerability poses significant risks to Samsung Plus TV users and network administrators who may not be aware of the exposure. The remote nature of the attack means that threat actors can exploit the vulnerability from outside the local network without requiring physical access or network credentials. This characteristic makes the vulnerability particularly dangerous as it can be exploited by adversaries located anywhere in the world, potentially leading to unauthorized access to home entertainment systems and associated personal data. The impact extends beyond simple information disclosure, as compromised devices could serve as entry points for further network infiltration or be used in larger distributed attacks.
Organizations and individuals should immediately update their Samsung Plus TV devices to firmware version 1.0.28.6 or later to remediate this vulnerability. The update process should include verification of the firmware version and implementation of proper network segmentation to limit exposure. Network monitoring should be enhanced to detect unusual traffic patterns that might indicate exploitation attempts. Security teams should implement device inventory tracking to ensure all Samsung Plus TV units are properly updated and monitored for similar vulnerabilities. Additional defensive measures include configuring firewalls to restrict access to device management interfaces, implementing network access controls, and conducting regular security assessments of connected IoT devices. The vulnerability also highlights the importance of secure coding practices and input validation as outlined in the OWASP Top Ten and MITRE ATT&CK framework, specifically addressing techniques related to information gathering and credential access that attackers can leverage through such flaws.