CVE-2025-26377
📋 TL;DR
This vulnerability allows authenticated low-privileged attackers to delete user accounts in Q-Free MaxTime systems via crafted HTTP requests. It affects all installations running version 2.11.0 or earlier. Organizations using vulnerable versions are at risk of unauthorized user account removal.
💻 Affected Systems
- Q-Free MaxTime
📦 What is this software?
Maxtime by Q Free
⚠️ Risk & Real-World Impact
Worst Case
An attacker could delete all user accounts, including administrators, causing complete loss of system access and requiring full system restoration from backups.
Likely Case
Attackers delete specific user accounts to disrupt operations, remove audit trails, or escalate privileges by eliminating higher-privileged accounts.
If Mitigated
With proper network segmentation and monitoring, impact is limited to unauthorized deletion of some user accounts requiring manual restoration.
🎯 Exploit Status
Requires authenticated access but low privileges. Attackers need to craft specific HTTP requests to the vulnerable endpoint.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Version > 2.11.0
Vendor Advisory: https://www.nozominetworks.com/labs/vulnerability-advisories-cve-2025-26377
Restart Required: No
Instructions:
1. Contact Q-Free for patched version >2.11.0. 2. Backup current configuration. 3. Apply the update following vendor instructions. 4. Verify authorization checks are properly implemented.
🔧 Temporary Workarounds
Network Access Control
allRestrict access to MaxTime web interface to authorized users only using firewall rules.
User Privilege Review
allReview and minimize user accounts with access to MaxTime interface.
🧯 If You Can't Patch
- Implement strict network segmentation to isolate MaxTime systems from untrusted networks
- Enable detailed logging of all user deletion events and implement alerting for suspicious patterns
🔍 How to Verify
Check if Vulnerable:
Check MaxTime version via web interface or configuration files. If version ≤2.11.0, system is vulnerable.Check Version:
Check web interface or configuration files for version informationVerify Fix Applied:
After patching, verify version >2.11.0 and test that low-privileged users cannot delete other user accounts.📡 Detection & Monitoring
Log Indicators:
- Multiple DELETE requests to /maxprofile/users/ endpoints from low-privileged accounts
- Unexpected user account deletion events
Network Indicators:
- HTTP DELETE requests to user management endpoints from unauthorized sources
SIEM Query:
source="maxtime" AND (method="DELETE" AND uri="/maxprofile/users/*") AND user_privilege="low"