CVE-2025-12386: Pix-Link LV-WR21Q Auth Bypass Vulnerability

CVE-2025-12386 Overview

CVE-2025-12386 is an authentication bypass vulnerability affecting the Pix-Link LV-WR21Q wireless router. The device fails to enforce any form of authentication for the /goform/getHomePageInfo endpoint, allowing remote unauthenticated attackers to access sensitive device information. This vulnerability enables attackers to retrieve cleartext credentials for the access point without requiring any prior authentication.

The vendor was notified about this vulnerability but did not respond with details regarding the vulnerability scope or vulnerable version range. Version V108_108 has been tested and confirmed as vulnerable, though other firmware versions may also be affected.

Critical Impact

Remote unauthenticated attackers can retrieve cleartext wireless access point passwords, potentially leading to complete network compromise and unauthorized access to connected devices.

Affected Products

• Pix-Link LV-WR21Q Wireless Router
• Firmware Version V108_108 (confirmed vulnerable)
• Other firmware versions may also be affected

Discovery Timeline

• 2026-01-27 - CVE-2025-12386 published to NVD
• 2026-01-27 - Last updated in NVD database

Technical Details for CVE-2025-12386

Vulnerability Analysis

This vulnerability is classified as CWE-306 (Missing Authentication for Critical Function). The Pix-Link LV-WR21Q router exposes a web management endpoint at /goform/getHomePageInfo that does not require any authentication credentials before returning sensitive device configuration data. The lack of authentication controls on this endpoint represents a fundamental security design flaw, as it allows any network-reachable attacker to query the device and extract sensitive information including cleartext wireless credentials.

The network-accessible nature of this vulnerability means that any attacker who can reach the router's web interface—whether from the local network or potentially from the internet if the management interface is exposed—can exploit this flaw with minimal effort. No user interaction is required, and the attack complexity is low.

Root Cause

The root cause of CVE-2025-12386 is the complete absence of authentication checks on the /goform/getHomePageInfo endpoint within the router's web management interface. This endpoint should validate that requesting clients have proper administrative credentials before returning sensitive configuration data, but no such validation exists. This represents a critical oversight in the firmware's access control implementation.

Attack Vector

The attack vector for this vulnerability is network-based. An attacker with network access to the Pix-Link LV-WR21Q router can directly request the vulnerable endpoint via HTTP. The exploitation process involves:

1. Identifying a Pix-Link LV-WR21Q device on the target network
2. Sending an unauthenticated HTTP request to the /goform/getHomePageInfo endpoint
3. Parsing the response to extract cleartext wireless credentials
4. Using the retrieved credentials to connect to the wireless network or access the router's administrative interface

The vulnerability can be exploited by sending a simple HTTP GET request to the router's management interface at the /goform/getHomePageInfo path. No authentication headers, cookies, or credentials are required. The router responds with device configuration information including the wireless access point password in cleartext format. Additional technical details are available in the CERT Poland Advisory.

Detection Methods for CVE-2025-12386

Indicators of Compromise

• Unexpected HTTP requests to /goform/getHomePageInfo endpoint from unauthorized IP addresses
• Anomalous network traffic patterns targeting router management interfaces
• Unauthorized wireless client connections following credential exposure
• Log entries showing repeated access to the vulnerable endpoint without authentication

Detection Strategies

• Monitor HTTP access logs for requests to /goform/getHomePageInfo from non-administrative sources
• Implement network intrusion detection rules to alert on unauthenticated access attempts to router management endpoints
• Deploy network traffic analysis to identify reconnaissance scanning targeting IoT device management interfaces
• Configure alerts for new wireless client connections that don't match known device inventories

Monitoring Recommendations

• Enable comprehensive logging on network perimeter devices to capture traffic to internal router management interfaces
• Deploy SIEM rules to correlate multiple access attempts to vulnerable endpoints across network segments
• Implement regular wireless client audits to detect unauthorized devices that may have connected using stolen credentials
• Monitor for changes to router configurations that could indicate post-exploitation activity

How to Mitigate CVE-2025-12386

Immediate Actions Required

• Isolate Pix-Link LV-WR21Q devices from untrusted network segments immediately
• Restrict access to the router's web management interface to trusted administrative hosts only using firewall rules
• Change wireless access point credentials after implementing access restrictions
• Monitor for unauthorized wireless connections using previously exposed credentials

Patch Information

At the time of publication, no official patch has been released by Pix-Link. The vendor was notified about this vulnerability but did not respond with remediation details. Organizations should monitor the Pix-Link product page for potential firmware updates. Additional information about this vulnerability can be found in the CERT Poland Advisory and the security research repository.

Workarounds

• Implement network segmentation to isolate vulnerable devices from critical network resources
• Deploy firewall rules to block external access to the router's web management interface on port 80/443
• Consider replacing affected devices with routers from vendors that provide timely security updates
• Use a VPN or secure tunnel for remote administrative access rather than exposing management interfaces directly

# Example firewall rule to restrict access to router management interface
# Block external access to router management on 192.168.1.1
iptables -A INPUT -d 192.168.1.1 -p tcp --dport 80 -s ! 192.168.1.0/24 -j DROP
iptables -A INPUT -d 192.168.1.1 -p tcp --dport 443 -s ! 192.168.1.0/24 -j DROP

# Allow only specific admin workstation to access management interface
iptables -A INPUT -d 192.168.1.1 -p tcp --dport 80 -s 192.168.1.100 -j ACCEPT
iptables -A INPUT -d 192.168.1.1 -p tcp --dport 443 -s 192.168.1.100 -j ACCEPT