CVE-2026-24347 Overview
CVE-2026-24347 is an improper input validation vulnerability affecting the Admin UI of EZCast Pro II wireless presentation devices. The flaw exists in version 1.17478.146 and allows authenticated attackers with network adjacency to manipulate files within the /tmp directory. This vulnerability stems from insufficient validation of user-supplied input in the administrative interface, potentially enabling unauthorized file operations on the affected device.
Critical Impact
Attackers on an adjacent network with administrative privileges can manipulate files in the /tmp directory, potentially leading to data integrity compromise on EZCast Pro II devices.
Affected Products
- EZCast Pro II version 1.17478.146
Discovery Timeline
- 2026-01-27 - CVE-2026-24347 published to NVD
- 2026-01-27 - Last updated in NVD database
Technical Details for CVE-2026-24347
Vulnerability Analysis
This vulnerability is classified as CWE-20 (Improper Input Validation), indicating that the Admin UI fails to properly validate, filter, or sanitize user-controlled input before using it in file operations. The attack requires the adversary to be on an adjacent network and possess high-level privileges (administrative access) to the device. Despite these prerequisites, successful exploitation allows complete integrity compromise of files within the /tmp directory without requiring any user interaction.
The adjacent network attack vector means that remote exploitation over the internet is not directly possible—attackers must have access to the same network segment as the vulnerable device. This limits the exposure primarily to internal network scenarios, such as corporate environments where EZCast Pro II devices are commonly deployed for wireless presentation capabilities.
Root Cause
The root cause of this vulnerability lies in improper input validation within the EZCast Pro II Admin UI. User-supplied input is not adequately sanitized before being used in file system operations, allowing attackers to craft malicious requests that manipulate files in unintended locations. Specifically, the /tmp directory becomes accessible for unauthorized file manipulation through the administrative interface.
Attack Vector
The attack requires an authenticated attacker with administrative privileges on an adjacent network. The attacker can exploit the improper input validation to manipulate files within the /tmp directory. This could involve creating, modifying, or deleting files, potentially affecting the device's operation or enabling further attacks such as privilege persistence or configuration tampering.
The vulnerability is exploited through the Admin UI by submitting specially crafted input that bypasses validation checks. Since the /tmp directory is commonly used for temporary file storage during device operations, manipulating files there could interfere with legitimate device functionality or inject malicious content into processing workflows.
Detection Methods for CVE-2026-24347
Indicators of Compromise
- Unusual file creation, modification, or deletion activity within the /tmp directory on EZCast Pro II devices
- Unexpected administrative login attempts or sessions from adjacent network hosts
- Anomalous HTTP requests to the Admin UI containing path traversal characters or encoded payloads
- Log entries showing file operations initiated through the administrative interface targeting temporary directories
Detection Strategies
- Monitor Admin UI access logs for suspicious patterns, including repeated requests with unusual parameters or path manipulation attempts
- Implement network monitoring to detect unauthorized devices attempting to access EZCast Pro II administrative interfaces
- Deploy file integrity monitoring on critical directories to detect unauthorized modifications
- Review administrative session logs for access from unexpected IP addresses within the local network segment
Monitoring Recommendations
- Enable verbose logging on EZCast Pro II devices to capture detailed administrative interface activity
- Configure network segmentation alerts to identify attempts to reach wireless presentation devices from unauthorized network zones
- Implement real-time alerting for any file system modifications within the /tmp directory during non-maintenance windows
How to Mitigate CVE-2026-24347
Immediate Actions Required
- Restrict network access to EZCast Pro II devices by implementing network segmentation and placing devices on isolated VLANs
- Review and limit administrative access to only essential personnel with a documented business need
- Monitor the NTC Advisory NTCF-2025-32806 for updated guidance and patch availability
- Audit administrative accounts and disable any unused or unnecessary admin credentials
Patch Information
At the time of publication, vendor patch information was not available in the CVE data. Organizations should monitor the official EZCast support channels and the NTC Advisory for security updates addressing this vulnerability. Apply firmware updates as soon as they become available from the vendor.
Workarounds
- Implement strict network access controls to limit which hosts can reach the Admin UI, restricting access to specific management workstations only
- Consider disabling the Admin UI when not actively in use for configuration purposes
- Deploy a web application firewall (WAF) or reverse proxy in front of the Admin UI to filter potentially malicious input
- Implement additional authentication layers such as VPN requirements before administrative access is permitted
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
