CVE-2026-15570 in Telefunken TE24553B45V2DZ Smart TV
Summary
by MITRE • 08/07/2026
An improper restriction of URL schemes and destinations in the SmartCenter browserseturl command in the Telefunken TE24553B45V2DZ Smart TV running on the Vestel MB181 / Voltron181 / TiVo OS platform allows an attacker with access to the same local network to cause the embedded browser to issue requests to unintended loopback/internal destinations, including 127.0.0.1 addresses. In demonstrated scenarios, requests initiated through the SmartCenter browserseturl mechanism could reach an internal service and receive a successful response, although the same destination was not reachable through normal browser navigation. The issue affects firmware version V2.78.0.0 and is fixed in firmware version V2.85.2.0.
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Analysis
by VulDB Data Team • 08/07/2026
The vulnerability described represents a critical security flaw in the Telefunken TE24553B45V2DZ Smart TV running on the Vestel MB181 platform, specifically within the SmartCenter browserseturl command implementation. This issue stems from inadequate validation of URL schemes and destinations, creating a pathway for unauthorized access to internal network services that should remain isolated from external reach. The flaw exists in the embedded browser component's handling of web requests, where the system fails to properly restrict or sanitize input parameters passed through the browserseturl command, allowing arbitrary destination specification without proper authorization checks.
The technical implementation of this vulnerability manifests through the improper restriction of URL schemes and destinations within the SmartCenter functionality. When an attacker executes the browserseturl command with maliciously crafted parameters, the embedded browser processes these requests without adequate validation of the target addresses. This allows requests to be directed toward loopback addresses including 127.0.0.1 and other internal network destinations that would normally be inaccessible through standard browsing operations. The vulnerability specifically affects firmware version V2.78.0.0 where the input sanitization mechanisms were insufficiently implemented, creating a direct pathway for attackers to probe internal services.
The operational impact of this vulnerability is significant as it enables local network attackers to perform unauthorized access attempts against internal services running on the device. Through this flaw, an attacker can potentially discover and interact with services bound to localhost interfaces that are not intended to be exposed externally. The demonstrated scenarios show that while normal browser navigation would prevent access to these internal destinations, the browserseturl mechanism creates a bypass that allows successful communication with internal services. This represents a privilege escalation opportunity where local network access can be leveraged to gain information disclosure or further attack capabilities against the device's internal components.
The vulnerability aligns with common security weaknesses documented in the CWE (Common Weakness Enumeration) catalog under categories related to improper input validation and insufficient restriction of URL schemes. From an ATT&CK framework perspective, this issue maps to techniques involving privilege escalation and reconnaissance through local network access. The attack vector specifically demonstrates a lack of proper input sanitization and destination validation, which are fundamental security controls that should prevent such bypasses. Organizations implementing similar embedded systems should consider the implications of allowing external command execution mechanisms without proper access controls and validation.
Mitigation strategies for this vulnerability include immediate firmware updates to version V2.85.2.0 where the issue has been addressed through improved input validation and URL scheme restrictions. Additionally, network segmentation measures should be implemented to isolate smart TV devices from critical internal services, limiting the potential impact of such vulnerabilities. Security monitoring should be enhanced to detect unusual browser activity patterns that might indicate exploitation attempts, particularly around loopback address access. Organizations should also consider implementing network access controls that prevent direct communication with localhost interfaces from external networks, even when these interfaces are not directly exposed through vulnerable commands.