CVE-2026-21035 Overview
CVE-2026-21035 is an improper input validation vulnerability in Samsung Plus TV affecting versions prior to 1.0.28.6. Remote attackers can exploit this flaw to access sensitive information processed by the application. The vulnerability requires user interaction but does not require authentication or elevated privileges. Samsung addressed the issue in its June 2026 Mobile Security Update.
Critical Impact
Remote attackers can access sensitive information through network-based exploitation of Samsung Plus TV when a user interacts with crafted input.
Affected Products
- Samsung Plus TV prior to version 1.0.28.6
- Samsung mobile devices running vulnerable Samsung Plus TV builds
- Samsung-branded streaming clients that bundle the Plus TV application
Discovery Timeline
- 2026-06-05 - CVE-2026-21035 published to NVD
- 2026-06-05 - Last updated in NVD database
Technical Details for CVE-2026-21035
Vulnerability Analysis
The Samsung Plus TV application fails to properly validate input received from network sources. An attacker can craft malicious input that the application processes without applying sufficient sanitization or boundary checks. The result is unauthorized exposure of sensitive information handled by the application.
Exploitation occurs over the network and requires the victim to interact with attacker-supplied content. No authentication is required. The flaw impacts the confidentiality of information accessible to the Samsung Plus TV process and can extend to subsystem-level data given the application's privileges on Samsung devices.
While the direct primary impact is information disclosure, the broader subsystem confidentiality, integrity, and availability indicators in the scoring vector suggest that disclosed data may enable follow-on actions against device subsystems. The Exploit Prediction Scoring System (EPSS) lists a probability of 0.24% as of 2026-06-11.
Root Cause
The root cause is improper input validation within Samsung Plus TV's request or content handling logic. The application accepts attacker-influenced data and processes it without enforcing expected structure, type, or range. This allows responses or internal state to leak sensitive values.
Attack Vector
The attack vector is Network. A remote attacker delivers crafted content — for example through a malicious media URL, manipulated streaming response, or hostile in-app interaction — and induces the user to engage with it. Once the user interacts, the application processes the unsanitized input and discloses sensitive information.
No verified proof-of-concept code is publicly available. The vulnerability is described in prose only because Samsung has not released exploit-level technical details. Refer to the Samsung Mobile Security Update for vendor guidance.
Detection Methods for CVE-2026-21035
Indicators of Compromise
- Samsung Plus TV application running at a version lower than 1.0.28.6 on managed mobile devices
- Outbound connections from Samsung Plus TV to unrecognized streaming or media endpoints
- Unusual access patterns to local application data directories belonging to Samsung Plus TV
Detection Strategies
- Inventory Samsung mobile devices and identify installed Samsung Plus TV versions through mobile device management (MDM) telemetry.
- Monitor mobile network traffic for connections to unverified domains initiated by the Samsung Plus TV process.
- Correlate application crash reports or unexpected data access events with the vulnerable version range.
Monitoring Recommendations
- Subscribe to the Samsung Mobile Security bulletin feed for updates to this advisory.
- Track app version compliance through enterprise mobility platforms and flag devices below 1.0.28.6.
- Alert on anomalous data egress from mobile endpoints running Samsung media applications.
How to Mitigate CVE-2026-21035
Immediate Actions Required
- Update Samsung Plus TV to version 1.0.28.6 or later on all affected devices.
- Apply the June 2026 Samsung Mobile Security Update across the device fleet.
- Restrict installation of media applications to managed app catalogs until patching is verified.
Patch Information
Samsung released a fix in Samsung Plus TV version 1.0.28.6. The patch is distributed through the Samsung June 2026 security update cycle. Review the Samsung Mobile Security Update bulletin for full version details and rollout guidance.
Workarounds
- Disable or uninstall Samsung Plus TV on devices that cannot receive the patch immediately.
- Block network access to streaming endpoints used by Samsung Plus TV until updates complete.
- Educate users to avoid interacting with untrusted media links or shared content in the application.
# Configuration example: query installed Samsung Plus TV version via adb
adb shell dumpsys package com.samsung.plustv | grep versionName
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
