CVE-2025-1739: Trivision Camera Auth Bypass Vulnerability

CVE-2025-1739 Overview

CVE-2025-1739 is an authentication bypass vulnerability affecting the Trivision Camera NC227WF firmware version 5.8.0 from TrivisionSecurity. The flaw allows an adjacent network attacker to retrieve administrator credentials in cleartext by sending a crafted curl request with arbitrary credentials to the /en/player/activex_pal.asp endpoint. The application incorrectly authenticates the request and returns sensitive configuration data. The vulnerability is tracked under CWE-288: Authentication Bypass Using an Alternate Path or Channel.

Critical Impact
Adjacent network attackers can extract administrator credentials in cleartext without valid authentication, enabling full device takeover and surveillance feed access.

Affected Products

Trivision Camera NC227WF firmware version 5.8.0
Vendor: TrivisionSecurity
Affected endpoint: /en/player/activex_pal.asp

Discovery Timeline

2025-02-27 - CVE-2025-1739 published to NVD
2026-04-15 - Last updated in NVD database

Technical Details for CVE-2025-1739

Vulnerability Analysis

The Trivision NC227WF IP camera exposes a web management interface that improperly validates authentication on the /en/player/activex_pal.asp resource. When an attacker on the adjacent network issues an HTTP request using curl with arbitrary username and password values, the server accepts the request as authenticated. The response includes administrative credentials transmitted in cleartext.

This allows an unauthenticated attacker with network adjacency to harvest valid administrator credentials. Once obtained, the attacker can authenticate against any other interface on the device, manipulate camera settings, view live video feeds, and pivot into the broader network segment.

Root Cause

The root cause is improper enforcement of authentication checks on a specific application path. The activex_pal.asp handler does not validate session tokens or verify submitted credentials before returning configuration data containing administrator credentials. The credentials are also stored or transmitted in cleartext rather than as hashed values, compounding the impact.

Attack Vector

Exploitation requires adjacent network access, meaning the attacker must be on the same logical network segment as the camera, such as a shared Wi-Fi network or VLAN. The attacker sends a single HTTP request with arbitrary credentials using curl or any HTTP client. No user interaction is required, and the attack complexity is low.

The vulnerability mechanism is documented in the INCIBE Security Notice. No verified public exploit code is available in standard exploit databases.

Detection Methods for CVE-2025-1739

Indicators of Compromise

HTTP GET or POST requests targeting /en/player/activex_pal.asp from unexpected source addresses on the local network
curl user-agent strings or other non-browser HTTP clients accessing camera management endpoints
Successful authentication events from the camera immediately following requests with random or malformed credential values
Outbound connections from the camera to unknown external hosts after a suspicious request

Detection Strategies

Monitor HTTP access logs on Trivision NC227WF devices for requests to the activex_pal.asp path, particularly from hosts that have not previously authenticated
Inspect network traffic on camera VLANs for cleartext credentials transmitted in HTTP responses
Correlate camera administrative actions with the source IP addresses initiating preceding HTTP sessions

Monitoring Recommendations

Deploy network monitoring on segments hosting IoT and surveillance devices to capture HTTP request and response patterns
Alert on any HTTP responses from camera devices that contain credential field names such as admin, password, or pwd in plaintext
Track configuration changes on camera devices and correlate them with authentication source identities

How to Mitigate CVE-2025-1739

Immediate Actions Required

Isolate Trivision NC227WF cameras on a dedicated VLAN with strict access control lists restricting management traffic to authorized administrative hosts only
Block all inbound HTTP access to the camera web interface from untrusted network segments and guest Wi-Fi
Rotate administrator credentials on all NC227WF devices and assume any previously configured credentials may be compromised
Disable remote management features if they are not actively required for operations

Patch Information

No vendor patch is referenced in the available advisory data. Consult the INCIBE Security Notice for the latest vendor coordination status. If no firmware update is published, treat the device as permanently vulnerable and apply compensating network controls.

Workarounds

Place affected cameras behind a reverse proxy that enforces authentication independently of the device firmware
Restrict access to the /en/player/activex_pal.asp endpoint at the network layer using a web application firewall or layer 7 firewall rule
Disable the ActiveX player functionality if the device configuration permits, removing the vulnerable handler from the request path
Replace the device with a hardware platform that receives ongoing security maintenance if no firmware fix becomes available

bash

# Example firewall rule to restrict camera management access
iptables -A FORWARD -p tcp -d <camera_ip> --dport 80 -s <admin_workstation_ip> -j ACCEPT
iptables -A FORWARD -p tcp -d <camera_ip> --dport 80 -j DROP