CVE-2026-25073: XikeStor SKS8310-8X XSS Vulnerability

CVE-2026-25073 Overview

CVE-2026-25073 is a stored cross-site scripting (XSS) vulnerability affecting XikeStor SKS8310-8X Network Switch firmware versions 1.04.B07 and prior. The vulnerability allows authenticated attackers to inject arbitrary script content through the System Name field. When the stored value is viewed by a victim, the malicious scripts execute in their browser due to improper output encoding.

Critical Impact

Authenticated attackers can persistently inject malicious JavaScript that executes in the context of other administrators' sessions, potentially leading to session hijacking, credential theft, or unauthorized configuration changes on network infrastructure devices.

Affected Products

• XikeStor SKS8310-8X Network Switch Firmware versions 1.04.B07 and prior
• Seekswan ZikeStor SKS8310-8X hardware devices
• Seekswan ZikeStor SKS8310-8X Firmware

Discovery Timeline

• 2026-03-07 - CVE-2026-25073 published to NVD
• 2026-03-12 - Last updated in NVD database

Technical Details for CVE-2026-25073

Vulnerability Analysis

This stored cross-site scripting vulnerability (CWE-79) exists in the web management interface of the XikeStor SKS8310-8X network switch. The vulnerability is network-accessible and requires low privileges to exploit, though user interaction is necessary for the malicious payload to trigger. An attacker with authenticated access to the device's administrative interface can inject malicious JavaScript code into the System Name configuration field.

The core issue stems from the firmware's failure to properly encode user-supplied input before rendering it in the administrative web interface. When other administrators or users view pages that display the System Name value, the injected script executes within their browser session with the same origin permissions as the legitimate management interface.

Root Cause

The vulnerability originates from improper output encoding in the firmware's web interface. When user input is stored in the System Name field and subsequently displayed to other users, the application fails to sanitize or encode special characters that have meaning in HTML/JavaScript contexts. This allows attackers to break out of the intended display context and inject executable script content.

Attack Vector

The attack requires authenticated access to the network switch's management interface. An attacker would navigate to the system configuration section and enter a malicious JavaScript payload in the System Name field. Common attack payloads could include scripts designed to steal session cookies, capture keystrokes, redirect administrators to phishing pages, or automatically perform configuration changes using the victim's session.

Since this is a stored XSS vulnerability, the malicious payload persists on the device and will execute each time an administrator views the affected configuration page. This persistence makes the attack particularly dangerous in environments with multiple network administrators.

Detection Methods for CVE-2026-25073

Indicators of Compromise

• Unusual or suspicious values in the System Name field containing HTML tags or JavaScript code
• System Name containing character sequences such as <script>, javascript:, onerror=, or encoded variants
• Unexpected HTTP requests originating from administrative sessions to external domains
• Administrator session tokens appearing in unusual network traffic patterns

Detection Strategies

• Review current System Name configuration for any HTML or script content that should not be present
• Monitor web server logs for requests containing XSS payloads targeting the system configuration endpoints
• Implement Content Security Policy (CSP) headers on the management interface if supported by the firmware
• Deploy network monitoring to detect exfiltration of session data from management interfaces

Monitoring Recommendations

• Enable comprehensive logging on the network switch if available and forward logs to a SIEM solution
• Monitor for configuration changes to the System Name field through change management processes
• Implement session monitoring to detect unusual administrative activity patterns
• Review administrator accounts for unauthorized access or suspicious login patterns

How to Mitigate CVE-2026-25073

Immediate Actions Required

• Audit the current System Name configuration value for any suspicious content containing HTML or JavaScript
• Restrict administrative access to the device to trusted networks only using firewall rules or VLAN segmentation
• Limit the number of user accounts with administrative privileges to reduce attack surface
• Consider disabling web-based management temporarily and use console access if critical operations are needed

Patch Information

At the time of publication, no vendor patch information is available. Organizations should monitor Seekswan for firmware updates addressing this vulnerability. Check the OpenWrt Device Overview for community-supported firmware alternatives that may address this issue.

Workarounds

• Isolate the management interface on a dedicated management VLAN with strict access controls
• Use firewall rules to restrict access to the web management interface to specific trusted IP addresses
• Implement network segmentation to limit the impact if the switch is compromised
• Consider deploying alternative firmware such as OpenWrt if compatible and organizational policy permits
• Educate administrators about the risk and implement procedures to verify System Name values after any administrative changes

# Example network segmentation - restrict management access
# Add firewall rules to limit access to switch management interface
iptables -A INPUT -p tcp --dport 80 -s 192.168.1.0/24 -j ACCEPT
iptables -A INPUT -p tcp --dport 443 -s 192.168.1.0/24 -j ACCEPT
iptables -A INPUT -p tcp --dport 80 -j DROP
iptables -A INPUT -p tcp --dport 443 -j DROP