CVE-2026-6998 Overview
A cross-site scripting (XSS) vulnerability has been identified in the BDCOM P3310D network device running firmware version 0.4.2 10.1.0F Build 86345. The vulnerability exists within the New RMON Statistics Page component, where improper handling of the Owner argument allows attackers to inject malicious scripts. This vulnerability can be exploited remotely by authenticated users with high privileges to execute arbitrary JavaScript in victim browsers.
Critical Impact
Authenticated attackers can inject malicious scripts through the RMON Statistics configuration interface, potentially leading to session hijacking, credential theft, or administrative action manipulation within the device management console.
Affected Products
- BDCOM P3310D firmware version 0.4.2 10.1.0F Build 86345
Discovery Timeline
- 2026-04-25 - CVE-2026-6998 published to NVD
- 2026-04-29 - Last updated in NVD database
Technical Details for CVE-2026-6998
Vulnerability Analysis
This vulnerability falls under CWE-79 (Improper Neutralization of Input During Web Page Generation), commonly known as Cross-Site Scripting. The flaw exists in the web management interface of the BDCOM P3310D device, specifically within the New RMON Statistics Page functionality.
When an authenticated administrator configures RMON (Remote Network Monitoring) statistics, the application fails to properly sanitize the Owner parameter before rendering it in the page output. This allows specially crafted input containing JavaScript code to be stored and later executed when the page is viewed by other users of the management interface.
The vulnerability requires high-privilege authentication to exploit, which somewhat limits the attack surface. However, in environments with multiple administrators or where credentials may be compromised, this XSS flaw could be leveraged for privilege escalation attacks or to establish persistent access to the device management interface.
Root Cause
The root cause of this vulnerability is insufficient input validation and output encoding in the RMON Statistics Page handler. The Owner argument is accepted without proper sanitization, allowing HTML and JavaScript content to be processed and stored. When this data is subsequently rendered in the web interface, the browser interprets the injected code as legitimate script content.
Attack Vector
The attack requires network access to the device's web management interface and valid credentials with high privileges. An attacker would navigate to the New RMON Statistics Page and inject malicious JavaScript code into the Owner field. This injected payload would then execute in the browser context of any user who views the affected RMON statistics page, potentially allowing the attacker to steal session tokens, modify device configuration, or perform other malicious actions on behalf of the victim.
The exploit has been publicly disclosed through VulDB Submission #797249, increasing the risk of exploitation in the wild.
Detection Methods for CVE-2026-6998
Indicators of Compromise
- Unexpected JavaScript code or HTML tags present in RMON statistics configuration fields
- Anomalous session activity from administrative accounts accessing the RMON Statistics Page
- Browser console errors or unusual script execution when accessing device management interface
Detection Strategies
- Monitor HTTP POST requests to the RMON Statistics Page for suspicious payloads containing <script> tags, event handlers, or encoded JavaScript
- Implement web application firewall (WAF) rules to detect XSS patterns in traffic destined for network device management interfaces
- Review device configuration exports for unexpected content in RMON owner fields
Monitoring Recommendations
- Enable detailed access logging on the BDCOM P3310D management interface
- Configure alerts for multiple failed authentication attempts followed by successful access to RMON configuration pages
- Implement network segmentation to restrict management interface access to authorized administrative networks only
How to Mitigate CVE-2026-6998
Immediate Actions Required
- Restrict network access to the BDCOM P3310D web management interface to trusted administrative hosts only
- Review all existing RMON statistics configurations for suspicious content in the Owner field
- Implement firewall rules to limit access to the device management port from untrusted networks
- Monitor for any signs of exploitation in management interface access logs
Patch Information
At the time of disclosure, the vendor (BDCOM) was contacted but did not respond. No official security patch is currently available. Organizations should monitor vendor communications and apply any security updates as soon as they become available.
For additional technical details, refer to VulDB Vulnerability #359557.
Workarounds
- Place the BDCOM P3310D management interface behind a reverse proxy with XSS filtering capabilities
- Restrict administrative access to a minimal number of trusted personnel using strong, unique credentials
- Consider disabling the RMON Statistics Page functionality if not required for operational purposes
- Implement network-level access controls (ACLs) to limit management interface exposure
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
