CVE-2025-65427
📋 TL;DR
This vulnerability allows attackers to perform unlimited password guessing attempts against the Dbit N300 T1 Pro router's login API endpoint. Attackers can brute-force credentials to gain unauthorized access to the router's administrative interface. All users of the affected router model with the vulnerable firmware are at risk.
💻 Affected Systems
- Dbit N300 T1 Pro Easy Setup Wireless Wi-Fi Router
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers gain administrative access to the router, allowing them to reconfigure network settings, intercept traffic, install malicious firmware, or use the router as a pivot point into the internal network.
Likely Case
Attackers compromise router credentials and gain administrative control, potentially enabling man-in-the-middle attacks, DNS hijacking, or network reconnaissance.
If Mitigated
With rate limiting implemented, attackers cannot efficiently brute-force credentials, reducing the risk to acceptable levels with strong passwords.
🎯 Exploit Status
The exploit requires no authentication and can be automated with simple scripts. Public proof-of-concept code is available on GitHub.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Unknown
Restart Required: No
Instructions:
Check vendor website for firmware updates. If available, download the latest firmware and apply it through the router's web interface.
🔧 Temporary Workarounds
Implement Network-Level Rate Limiting
allUse a firewall or network security device to limit connection attempts to the router's login API endpoint.
Change Default Credentials
allUse strong, unique passwords that are resistant to brute-force attacks.
🧯 If You Can't Patch
- Isolate the router from the internet by placing it behind a firewall that blocks external access to the administrative interface.
- Implement network segmentation to limit the router's access to critical internal resources.
🔍 How to Verify
Check if Vulnerable:
Check the router's firmware version in the web interface. If it shows V1.0.0, the device is vulnerable.Check Version:
Login to router web interface and navigate to System Status or About page to check firmware version.Verify Fix Applied:
Verify that the firmware version has been updated to a version later than V1.0.0, or test that login attempts are now rate-limited.📡 Detection & Monitoring
Log Indicators:
- Multiple failed login attempts from single IP addresses
- Unusual authentication patterns to /api/login endpoint
Network Indicators:
- High volume of POST requests to /api/login from external sources
- Traffic patterns suggesting automated credential guessing
SIEM Query:
source_ip=* AND destination_port=80 AND http_method=POST AND uri_path="/api/login" AND status_code=401 | stats count by source_ip | where count > 10