CVE-2025-45746
📋 TL;DR
CVE-2025-45746 allows unauthenticated attackers to craft valid JWT tokens using a hardcoded secret, enabling authentication bypass to the ZKT ZKBio CVSecurity service console. This affects organizations using ZKT ZKBio CVSecurity 6.4.1_R. The vendor disputes severity, noting the console is typically LAN-only and doesn't grant application-level access.
💻 Affected Systems
- ZKT ZKBio CVSecurity
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of the service console leading to potential system manipulation, service disruption, or lateral movement within the network if combined with other vulnerabilities.
Likely Case
Unauthorized access to the service console for monitoring or limited administrative functions, potentially enabling reconnaissance or service disruption.
If Mitigated
Limited impact if console is properly segmented and monitored, with no access to sensitive application data or login credentials.
🎯 Exploit Status
Exploitation requires knowledge of the hardcoded secret, which appears to be publicly documented in the CVE references.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not available
Vendor Advisory: Not available
Restart Required: No
Instructions:
No official patch available. Monitor vendor communications for updates.
🔧 Temporary Workarounds
Network Segmentation
allRestrict access to the service console to trusted internal networks only using firewall rules.
Access Control Lists
allImplement IP-based access controls to limit which systems can reach the service console interface.
🧯 If You Can't Patch
- Implement strict network segmentation to isolate the ZKT ZKBio CVSecurity system from untrusted networks.
- Enable detailed logging and monitoring of authentication attempts to the service console for suspicious activity.
🔍 How to Verify
Check if Vulnerable:
Check if running ZKT ZKBio CVSecurity version 6.4.1_R. Attempt to authenticate to service console using JWT token crafted with known hardcoded secret.Check Version:
Check application interface or configuration files for version information specific to ZKT ZKBio CVSecurity.Verify Fix Applied:
Verify that JWT tokens created with the hardcoded secret no longer grant access to the service console.📡 Detection & Monitoring
Log Indicators:
- Failed authentication attempts followed by successful authentication using JWT tokens
- Unusual source IP addresses accessing service console
Network Indicators:
- Traffic to service console port from unexpected sources
- JWT tokens in authentication requests
SIEM Query:
source_ip NOT IN (trusted_networks) AND destination_port = (service_console_port) AND http_method = POST AND uri CONTAINS 'auth'