CVE-2026-25072: XikeStor SKS8310-8X Auth Bypass Flaw

CVE-2026-25072 Overview

CVE-2026-25072 is a predictable session identifier vulnerability affecting XikeStor SKS8310-8X Network Switch firmware versions 1.04.B07 and prior. The vulnerability exists in the /goform/SetLogin endpoint and allows remote attackers to hijack authenticated sessions by predicting session identifiers using insufficiently random cookie values. Attackers can also exploit exposed session parameters in URLs to gain unauthorized access to authenticated user sessions.

Critical Impact

Remote attackers can hijack authenticated administrator sessions on affected network switches, potentially gaining full control over network infrastructure including configuration changes, traffic interception, and denial of service.

Affected Products

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

Discovery Timeline

• 2026-03-07 - CVE-2026-25072 published to NVD
• 2026-03-12 - Last updated in NVD database

Technical Details for CVE-2026-25072

Vulnerability Analysis

This vulnerability stems from improper session management within the XikeStor SKS8310-8X network switch firmware. The /goform/SetLogin authentication endpoint generates session identifiers using an insufficiently random algorithm (CWE-330: Use of Insufficiently Random Values). When users authenticate to the switch's web management interface, the session tokens assigned are predictable and can be calculated or brute-forced by attackers observing network traffic patterns.

The attack surface is network-accessible, meaning any attacker with network visibility to the management interface can attempt exploitation. The vulnerability requires user interaction in that an administrator must have an active authenticated session for hijacking to occur. Successful exploitation results in complete compromise of confidentiality and integrity of the administrative session, allowing attackers to perform any action the authenticated administrator could perform.

Root Cause

The root cause of CVE-2026-25072 is the use of insufficiently random values in session identifier generation (CWE-330). The firmware's authentication mechanism fails to implement cryptographically secure random number generation for session tokens. Instead, it relies on predictable algorithms or weak entropy sources that allow attackers to calculate valid session identifiers. Additionally, session parameters may be exposed in URLs, further reducing the security of the session management system and creating opportunities for session token leakage through browser history, server logs, or referrer headers.

Attack Vector

The attack vector for this vulnerability is network-based. An attacker positioned on the same network segment or with visibility to the management interface traffic can:

1. Observe authentication traffic to the /goform/SetLogin endpoint
2. Analyze session cookie patterns to identify the weak random number generation algorithm
3. Predict or enumerate valid session identifiers
4. Inject predicted session tokens to hijack active administrator sessions
5. Gain unauthorized access to switch management functions

The vulnerability is exploitable without authentication against the target device, though it requires an existing authenticated session from a legitimate user to hijack. Exploitation could allow attackers to modify switch configurations, create persistence mechanisms, intercept network traffic, or cause denial of service conditions.

Detection Methods for CVE-2026-25072

Indicators of Compromise

• Unusual login activity or session creation patterns on the switch management interface
• Multiple concurrent sessions from different IP addresses using the same or similar session identifiers
• Access logs showing session tokens being used from unexpected network locations
• Administrative changes performed without corresponding legitimate administrator activity
• Anomalous requests to /goform/SetLogin endpoint from non-standard clients or IP addresses

Detection Strategies

• Monitor network traffic for authentication requests to /goform/SetLogin on affected devices
• Implement network intrusion detection rules to identify session prediction or brute-force attempts
• Review switch access logs for concurrent sessions or geographically impossible login patterns
• Deploy network monitoring to detect unauthorized access to switch management interfaces

Monitoring Recommendations

• Enable verbose logging on affected XikeStor switches if available
• Implement network segmentation to isolate management interfaces from general network traffic
• Deploy network monitoring tools to track all access to switch management ports
• Establish baseline authentication patterns to identify anomalous session activity

How to Mitigate CVE-2026-25072

Immediate Actions Required

• Restrict network access to switch management interfaces using firewall rules or access control lists
• Implement network segmentation to isolate management traffic from untrusted networks
• Use a VPN or out-of-band management network for administrative access
• Monitor for suspicious authentication activity and investigate anomalies promptly
• Consider replacing affected devices with switches from vendors with better security practices

Patch Information

At the time of publication, no vendor patch has been identified for CVE-2026-25072. Organizations should monitor OpenWRT Device Overview for potential community firmware alternatives or contact Seekswan directly for security updates. Until a patch is available, implement the workarounds listed below to reduce risk exposure.

Workarounds

• Place the switch management interface on an isolated VLAN accessible only to authorized administrators
• Implement firewall rules restricting access to the management interface to specific trusted IP addresses
• Use HTTPS for all management access to prevent session token interception in transit
• Reduce session timeout values to minimize the window of opportunity for session hijacking

# Example ACL configuration to restrict management access (syntax varies by device)
# Allow management access only from trusted admin workstation
ip access-list extended MGMT-RESTRICT
  permit tcp host 192.168.1.100 any eq 443
  permit tcp host 192.168.1.100 any eq 80
  deny tcp any any eq 443
  deny tcp any any eq 80