CVE-2026-6997 Overview
A Cross-Site Scripting (XSS) vulnerability has been identified in BDCOM P3310D firmware version 0.4.2 10.1.0F Build 86345. This security flaw affects the New RMON History Page component, where improper handling of the Owner argument allows attackers to inject malicious scripts. The vulnerability can be exploited remotely over the network, and proof-of-concept exploit code has been publicly disclosed.
Critical Impact
Remote attackers with high privileges can inject malicious scripts through the Owner parameter in the New RMON History Page, potentially compromising user sessions and stealing sensitive information from authenticated administrators.
Affected Products
- BDCOM P3310D firmware version 0.4.2 10.1.0F Build 86345
Discovery Timeline
- 2026-04-25 - CVE-2026-6997 published to NVD
- 2026-04-29 - Last updated in NVD database
Technical Details for CVE-2026-6997
Vulnerability Analysis
This vulnerability is classified as CWE-79 (Improper Neutralization of Input During Web Page Generation), commonly known as Cross-Site Scripting. The flaw exists in the New RMON History Page component of the BDCOM P3310D network device. When processing the Owner argument, the application fails to properly sanitize user-supplied input before rendering it in the web interface, allowing attackers to inject arbitrary JavaScript code that executes in the context of other users' browser sessions.
The attack requires the attacker to have high privileges on the system and user interaction is necessary for successful exploitation. Despite these requirements, the network-accessible nature of the attack surface means that any authenticated administrator accessing a maliciously crafted page could have their session compromised.
Root Cause
The root cause of this vulnerability is insufficient input validation and output encoding in the New RMON History Page functionality. The Owner parameter accepts user input that is directly reflected in the HTML output without proper sanitization or encoding, creating an injection point for malicious scripts. This is a classic stored or reflected XSS pattern where untrusted data is included in web pages without appropriate escaping.
Attack Vector
The attack is conducted remotely over the network (AV:N). An attacker with high-level privileges can manipulate the Owner argument within the New RMON History Page interface to inject malicious JavaScript payloads. When other users or administrators view the affected page, the injected script executes within their browser context, potentially enabling session hijacking, credential theft, or unauthorized actions on behalf of the victim.
The exploit has been publicly disclosed and may be actively used. For technical details on the exploitation method, refer to the VulDB Submission Report and VulDB Vulnerability Entry.
Detection Methods for CVE-2026-6997
Indicators of Compromise
- Unusual JavaScript code or HTML tags appearing in the Owner field values within RMON History configurations
- Web server logs showing requests to the New RMON History Page with suspicious URL-encoded characters or script tags in parameters
- Unexpected changes to device configurations or user session anomalies following administrator access to the RMON History interface
Detection Strategies
- Implement web application firewall (WAF) rules to detect and block common XSS payloads targeting the New RMON History Page endpoints
- Monitor HTTP request logs for suspicious patterns in the Owner parameter including <script>, javascript:, onerror=, and other common XSS vectors
- Deploy network-based intrusion detection signatures to identify attempts to inject malicious content into BDCOM device management interfaces
Monitoring Recommendations
- Enable detailed logging on the BDCOM P3310D device to capture all administrative interface access and configuration changes
- Implement session monitoring to detect anomalies that may indicate session hijacking following XSS exploitation
- Review web interface access logs regularly for unexpected or malformed requests to the RMON History Page component
How to Mitigate CVE-2026-6997
Immediate Actions Required
- Restrict network access to the BDCOM P3310D management interface to trusted IP addresses and administrative networks only
- Implement strong content security policies (CSP) at the network perimeter if possible to limit script execution
- Educate administrators about the risk of clicking on untrusted links while authenticated to the device management interface
- Consider disabling the New RMON History functionality if it is not operationally required until a patch is available
Patch Information
The vendor (BDCOM) was contacted early about this disclosure but did not respond. As of the last update on 2026-04-29, no official patch has been released. Organizations should monitor the VulDB Vulnerability Entry and BDCOM's official channels for future security updates. Consider reaching out to the vendor directly for remediation guidance.
Workarounds
- Implement network segmentation to isolate device management interfaces from general network access
- Deploy a reverse proxy or WAF with XSS filtering capabilities in front of the management interface
- Use browser-based security extensions that detect and block XSS attempts when administrators access the device
- Limit the number of users with high-privilege access to reduce the attack surface
# Network ACL example - Restrict management interface access
# Apply on upstream firewall/router to limit access to BDCOM management IP
# Allow only trusted admin subnet
iptables -A INPUT -p tcp --dport 80 -s 10.10.10.0/24 -j ACCEPT
iptables -A INPUT -p tcp --dport 443 -s 10.10.10.0/24 -j ACCEPT
# Block all other access to management ports
iptables -A INPUT -p tcp --dport 80 -j DROP
iptables -A INPUT -p tcp --dport 443 -j DROP
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
