CVE-2025-65883
📋 TL;DR
This vulnerability allows a local network attacker to execute arbitrary commands with root privileges on Genexis Platinum P4410 routers. The issue stems from improper session invalidation after administrator logout, enabling attackers to reuse stale session tokens. Only users of the specific router model and firmware version are affected.
💻 Affected Systems
- Genexis Platinum P4410 router
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of the router with root access, allowing attackers to intercept/modify all network traffic, install persistent malware, pivot to other devices, or disable network connectivity.
Likely Case
Local network attacker gains router control, enabling traffic monitoring, DNS hijacking, credential theft, and potential lateral movement to connected devices.
If Mitigated
With proper network segmentation and access controls, impact limited to isolated network segment; attacker cannot pivot to critical systems.
🎯 Exploit Status
Exploit requires capturing a valid administrator session token after logout; detailed technical analysis available in public reference.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Unknown
Restart Required: No
Instructions:
1. Check vendor website for firmware updates
2. If update available, download and apply via router admin interface
3. Monitor vendor communications for security patches
🔧 Temporary Workarounds
Force Session Invalidation
allManually clear browser cookies/sessions after router administration
Browser-specific: Clear cookies and site data for router IP
Restrict Diagnostic Endpoint Access
linuxUse firewall rules to block access to router diagnostic interface from untrusted devices
iptables -A INPUT -s [ROUTER_IP] -p tcp --dport [DIAG_PORT] -j DROP
🧯 If You Can't Patch
- Segment network to isolate router management interface from general user traffic
- Implement strict access controls allowing only trusted devices to communicate with router management interface
🔍 How to Verify
Check if Vulnerable:
Check router firmware version in admin interface; if version is P4410-V2-1.41, device is vulnerable.Check Version:
Login to router admin interface and navigate to System Status or Firmware Information pageVerify Fix Applied:
Verify firmware version has been updated to a version later than P4410-V2-1.41.📡 Detection & Monitoring
Log Indicators:
- Multiple failed login attempts followed by successful authentication with old session token
- Unusual commands executed via diagnostic endpoint
- Administrator logout events without corresponding session termination
Network Indicators:
- Unusual traffic patterns to router diagnostic port from non-admin devices
- HTTP requests with stale session tokens to admin endpoints
SIEM Query:
source="router.log" AND ("diagnostic endpoint" OR "session token reuse" OR "invalid session")