CVE-2026-0790 Overview
CVE-2026-0790 is an information disclosure vulnerability affecting the web-based user interface of ALGO 8180 IP Audio Alerter devices. This vulnerability allows remote attackers to disclose sensitive information without requiring authentication. The flaw exists within the web UI and enables unauthorized data access by navigating directly to specific URLs, bypassing normal access controls.
Critical Impact
Unauthenticated remote attackers can access sensitive device information by directly requesting specific URLs in the web interface, potentially exposing configuration data, credentials, or other sensitive information stored on the device.
Affected Products
- ALGO 8180 IP Audio Alerter devices
- ALGO 8180 Web-based User Interface
Discovery Timeline
- 2026-01-23 - CVE-2026-0790 published to NVD
- 2026-01-26 - Last updated in NVD database
Technical Details for CVE-2026-0790
Vulnerability Analysis
This vulnerability is classified under CWE-425 (Direct Request / Forced Browsing), which occurs when a web application fails to properly enforce access controls on URLs that should be restricted. In the case of the ALGO 8180 IP Audio Alerter, the web-based user interface does not adequately validate whether a user is authorized to access certain resources before serving content.
The vulnerability was tracked by the Zero Day Initiative as ZDI-CAN-28299 and later published as ZDI-26-012. The network-accessible nature of this vulnerability combined with the lack of authentication requirements makes it particularly concerning for organizations deploying these devices in accessible network segments.
Root Cause
The root cause is improper access control implementation in the ALGO 8180 web interface. The application fails to verify user authentication and authorization before serving sensitive content. When users request URLs directly, the application serves the content without checking whether the requester has legitimate access rights. This is a classic forced browsing vulnerability where security relies on users not knowing or guessing the correct URLs rather than enforcing proper access controls.
Attack Vector
The attack vector is network-based and requires no user interaction or authentication. An attacker with network access to the ALGO 8180 device can enumerate or guess URLs within the web interface to access sensitive information. The attack does not require special privileges or complex techniques—simply navigating to unprotected URLs is sufficient to retrieve sensitive data.
The vulnerability can be exploited by directly requesting URLs that should be protected. When an attacker accesses these endpoints without proper authentication, the web server responds with sensitive information that should only be accessible to authenticated administrators. This could include device configuration settings, network information, or other operational data stored on the device.
Detection Methods for CVE-2026-0790
Indicators of Compromise
- Unusual HTTP requests to sensitive web interface URLs from unauthorized IP addresses
- Access patterns showing systematic enumeration of web interface endpoints
- HTTP 200 responses to sensitive URLs from unauthenticated sessions
- Increased web traffic to the ALGO 8180 device from external or unexpected network segments
Detection Strategies
- Implement network monitoring to track all HTTP requests to ALGO 8180 devices
- Configure web application firewalls to alert on direct URL access attempts to sensitive endpoints
- Review access logs for requests to configuration or administrative URLs without prior authentication
- Deploy intrusion detection rules to identify forced browsing patterns against IoT devices
Monitoring Recommendations
- Enable verbose logging on ALGO 8180 devices if supported by firmware
- Implement centralized log collection for all IoT and IP-enabled devices
- Set up alerts for any access to ALGO 8180 web interfaces from non-administrative network segments
- Regularly audit device access logs for anomalous request patterns
How to Mitigate CVE-2026-0790
Immediate Actions Required
- Restrict network access to ALGO 8180 devices to trusted administrative networks only
- Implement network segmentation to isolate IP audio alerter devices from general network traffic
- Deploy a reverse proxy or web application firewall in front of the device to enforce authentication
- Disable remote web interface access if not required for operations
Patch Information
No vendor patch information is currently available. Organizations should monitor the Zero Day Initiative Advisory ZDI-26-012 and ALGO vendor communications for updates regarding a security patch for this vulnerability. Contact ALGO directly for firmware update availability and timeline.
Workarounds
- Place ALGO 8180 devices behind a VPN to require authentication before network access
- Configure firewall rules to restrict access to the device web interface to specific trusted IP addresses
- Implement network access control lists (ACLs) to limit which hosts can communicate with the device
- Consider disabling the web interface entirely if device management can be accomplished through alternative means
# Example firewall rule to restrict access to ALGO 8180 web interface
# Replace 192.168.1.100 with your ALGO device IP
# Replace 10.0.0.0/24 with your trusted admin network
# iptables example - allow only admin network
iptables -A FORWARD -d 192.168.1.100 -p tcp --dport 80 -s 10.0.0.0/24 -j ACCEPT
iptables -A FORWARD -d 192.168.1.100 -p tcp --dport 80 -j DROP
iptables -A FORWARD -d 192.168.1.100 -p tcp --dport 443 -s 10.0.0.0/24 -j ACCEPT
iptables -A FORWARD -d 192.168.1.100 -p tcp --dport 443 -j DROP
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
