CVE-2026-25807
📋 TL;DR
CVE-2026-25807 is a critical vulnerability in ZAI Shell's P2P terminal sharing feature that allows unauthenticated remote attackers to execute arbitrary system commands. Attackers can connect to port 5757 and send commands that execute with the user's privileges if approved without review, bypassing all safety checks. This affects all ZAI Shell users running versions before 9.0.3 with the P2P sharing feature enabled.
💻 Affected Systems
- ZAI Shell
📦 What is this software?
Zai Shell by Taklaxbr
⚠️ Risk & Real-World Impact
Worst Case
Remote attacker gains full system control, executes arbitrary commands with user privileges, leading to complete system compromise, data theft, ransomware deployment, or lateral movement.
Likely Case
Remote attacker executes commands to steal sensitive data, install backdoors, or disrupt operations, especially in environments where users might approve commands without proper review.
If Mitigated
Limited impact if proper network segmentation, firewalls, and user awareness prevent unauthorized connections and command approval.
🎯 Exploit Status
Exploitation requires only a simple socket connection to port 5757 and sending commands that the user might approve without review. No authentication or special tools needed.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 9.0.3
Vendor Advisory: https://github.com/TaklaXBR/zai-shell/security/advisories/GHSA-6pjj-r955-34rr
Restart Required: Yes
Instructions:
1. Download ZAI Shell version 9.0.3 or later from official repository. 2. Stop all ZAI Shell processes. 3. Install the updated version. 4. Restart ZAI Shell services.
🔧 Temporary Workarounds
Block Port 5757
linuxPrevent external and internal access to the vulnerable port using firewall rules.
sudo iptables -A INPUT -p tcp --dport 5757 -j DROP
sudo ufw deny 5757
Disable P2P Sharing
allDisable the vulnerable P2P terminal sharing feature entirely.
zai-shell config set p2p_sharing false
🧯 If You Can't Patch
- Implement strict network segmentation to isolate systems running ZAI Shell and block all traffic to port 5757 at network perimeter.
- Enforce user training to never approve commands in P2P sessions without thorough review, and disable --no-ai mode usage.
🔍 How to Verify
Check if Vulnerable:
Check if ZAI Shell is running and listening on port 5757: 'netstat -tlnp | grep 5757' or 'ss -tlnp | grep 5757'. If listening and version <9.0.3, system is vulnerable.Check Version:
zai-shell --versionVerify Fix Applied:
After patching, verify version is 9.0.3 or higher with 'zai-shell --version' and confirm port 5757 is no longer open or requires authentication.📡 Detection & Monitoring
Log Indicators:
- Unusual connections to port 5757 in system logs
- ZAI Shell logs showing P2P session activity from unexpected sources
- Commands executed via ZAI Shell that weren't initiated by the user
Network Indicators:
- Unexpected TCP connections to port 5757 from internal or external IPs
- Traffic patterns showing command execution sequences on port 5757
SIEM Query:
source="*zai-shell*" AND (event="p2p_session" OR port=5757) | stats count by src_ip, user