Description

Tycon Systems TPDIN-Monitor-WEB3 versions 2.2.9 and prior are vulnerable to a Missing Authorization vulnerability. This could allow an attacker to extract system credentials, configurations, or flash contents.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "8.1",
  "pubDate": "2026-09-04T22:17:18.683Z",
  "pubdate": "2026-09-04T22:17:18.683Z",
  "executiveSummary": "Tycon Systems TPDIN-Monitor-WEB3 versions 2.2.9 and prior are susceptible to a Missing Authorization vulnerability. This security flaw allows unauthenticated remote attackers to bypass access control mechanisms and retrieve sensitive system data.\nThe vulnerability pertains to the lack of proper authentication enforcement within the web interface, permitting unauthorized interaction with internal device management functions. By exploiting this flaw, an attacker can extract critical system credentials, full device configurations, and proprietary flash memory contents.\nThe risk implication is severe, as the exposure of credentials and configurations facilitates lateral movement within the network or complete device takeover. No specific user privileges are required for exploitation, and the simplicity of the attack vector allows for automated harvesting of sensitive information over the network.\nThis vulnerability highlights a critical breakdown in session management and access control protocols within the firmware, necessitating immediate attention to prevent unauthorized data exfiltration.",
  "technicalDetails": "The vulnerability stems from a flaw in the application's authentication logic, specifically the failure to enforce mandatory authorization checks on sensitive administrative endpoints. In TPDIN-Monitor-WEB3 versions 2.2.9 and prior, the web server fails to validate the session state or user privilege level before fulfilling requests for administrative files and internal data stores.\nRoot cause analysis indicates that the web-based management interface does not correctly gate access to system configuration files and sensitive memory regions. Rather than validating session cookies or auth tokens, the backend processes incoming requests as trusted commands if they point to specific backend resources or endpoints traditionally reserved for post-login activity. Consequently, an attacker can bypass the login screen entirely by crafting HTTP requests targeting these unauthenticated routes.\nThe exploitation method involves the issuance of direct HTTP GET or POST requests to known resource URIs that contain system configuration backups, credential storage files, or memory dump triggers. An attacker does not require a valid login session; they simply probe the device for accessible endpoints that return the contents of the configuration memory or active credential storage.\nThe attack flow follows these steps: 1. Reconnaissance: The attacker identifies the device model and firmware version (2.2.9 or earlier) via banner grabbing or service fingerprinting. 2. Request Crafting: The attacker constructs a targeted request toward specific internal files such as configuration exports or diagnostic logs. 3. Exploitation: The web server processes the request without authorization validation and transmits the requested data—including sensitive credentials or flash content—in the HTTP response body. 4. Post-Exploitation: The attacker parses the returned data to extract plain-text credentials, VPN configurations, or network topology details contained within the system configuration.\nThe vulnerable component is the device's integrated web management service, which acts as the primary interface for system configuration. Because this interface is often exposed via the network to allow remote monitoring, the lack of proper authentication enforcement creates a critical security gap. The post-exploitation impact is catastrophic, potentially leading to unauthorized device control, persistent access for the attacker, and the compromise of wider network infrastructure through leaked credentials or configuration data."
}