CVE-2026-24346: EZCast Pro II Auth Bypass Vulnerability

CVE-2026-24346 Overview

CVE-2026-24346 is a hardcoded credentials vulnerability affecting the Admin UI of EZCast Pro II version 1.17478.146. The vulnerability allows attackers with adjacent network access to authenticate to protected areas of the web application using well-known default credentials. This weakness (CWE-798: Use of Hard-coded Credentials) represents a significant security risk in enterprise and educational environments where EZCast Pro II devices are commonly deployed for wireless presentation and screen mirroring.

Critical Impact

Attackers on the adjacent network can gain unauthorized administrative access to EZCast Pro II devices, potentially compromising device configuration, intercepting presentation content, and using the device as a pivot point for further network attacks.

Affected Products

• EZCast Pro II version 1.17478.146
• EZCast Pro II Admin UI web application

Discovery Timeline

• 2026-01-27 - CVE CVE-2026-24346 published to NVD
• 2026-01-27 - Last updated in NVD database

Technical Details for CVE-2026-24346

Vulnerability Analysis

This vulnerability stems from the presence of hard-coded default credentials in the EZCast Pro II Admin UI. The web-based administrative interface allows device configuration and management but ships with well-known default authentication credentials that many administrators fail to change after deployment.

The adjacent network attack vector means an attacker must be on the same network segment as the vulnerable device to exploit this vulnerability. However, once authenticated, the attacker gains access to protected administrative functionality within the web application, which could include device settings, network configuration, and potentially sensitive presentation data.

Root Cause

The root cause of CVE-2026-24346 is the use of hard-coded credentials (CWE-798) in the firmware of EZCast Pro II devices. This is a common security anti-pattern in IoT and embedded devices where manufacturers ship products with static, well-known credentials for initial setup convenience. The vulnerability persists because:

1. Default credentials are embedded in the firmware and publicly documented
2. No mandatory password change is enforced during initial device setup
3. Administrators may be unaware of the security implications of leaving default credentials unchanged

Attack Vector

The attack requires adjacent network access, meaning the attacker must be on the same local network segment as the EZCast Pro II device. The exploitation process involves:

1. Attacker identifies EZCast Pro II devices on the local network through network scanning
2. Attacker accesses the Admin UI web interface, typically exposed on the device's IP address
3. Attacker authenticates using the well-known default credentials
4. Upon successful authentication, the attacker gains administrative access to the device configuration

The vulnerability does not require user interaction and can be exploited without any prior privileges on the target system. For detailed technical information, refer to the NTC Security Advisory.

Detection Methods for CVE-2026-24346

Indicators of Compromise

• Unexpected login attempts to EZCast Pro II Admin UI from unfamiliar IP addresses on the local network
• Multiple failed or successful authentication events in device logs using default credential patterns
• Configuration changes to EZCast Pro II devices without authorized administrator activity
• Network traffic analysis showing repeated access to EZCast Admin UI endpoints

Detection Strategies

• Monitor network traffic for HTTP/HTTPS connections to EZCast Pro II devices from unauthorized endpoints
• Implement network segmentation monitoring to detect lateral movement attempts from compromised devices
• Deploy endpoint detection on systems that interact with EZCast devices to identify post-exploitation activity
• Use authentication monitoring to detect successful logins with default or common credentials

Monitoring Recommendations

• Enable and collect Admin UI access logs from all deployed EZCast Pro II devices
• Implement alerting for any administrative changes to device configuration
• Conduct regular network scans to identify EZCast devices still using default credentials
• Monitor for reconnaissance activity targeting device discovery protocols used by EZCast

How to Mitigate CVE-2026-24346

Immediate Actions Required

• Change all default credentials on EZCast Pro II devices immediately to strong, unique passwords
• Isolate EZCast Pro II devices on a dedicated network segment with restricted access
• Audit all deployed EZCast Pro II devices to identify those running vulnerable firmware version 1.17478.146
• Implement network access controls to limit which systems can access the Admin UI

Patch Information

Refer to the NTC Security Advisory for information regarding firmware updates and official remediation guidance from the vendor. Organizations should monitor for firmware updates that address this default credential vulnerability.

Workarounds

• Immediately change all default credentials to strong, unique passwords on all EZCast Pro II devices
• Implement network segmentation to isolate presentation devices from sensitive network segments
• Use firewall rules to restrict Admin UI access to authorized management workstations only
• Consider disabling the Admin UI web interface if remote management is not required
• Implement 802.1X network authentication to prevent unauthorized devices from accessing the same network segment as EZCast devices

# Network segmentation example using firewall rules
# Restrict access to EZCast Admin UI (replace IP ranges as appropriate)

# Allow only management VLAN to access EZCast Admin UI
iptables -A FORWARD -s 192.168.100.0/24 -d 192.168.200.0/24 -p tcp --dport 80 -j ACCEPT
iptables -A FORWARD -s 192.168.100.0/24 -d 192.168.200.0/24 -p tcp --dport 443 -j ACCEPT

# Block all other access to EZCast devices on presentation VLAN
iptables -A FORWARD -d 192.168.200.0/24 -p tcp --dport 80 -j DROP
iptables -A FORWARD -d 192.168.200.0/24 -p tcp --dport 443 -j DROP