CVE-2026-2749: Centreon Open Tickets Vulnerability

CVE-2026-2749 Overview

A critical vulnerability has been identified in Centreon Open Tickets, a module for the Centreon monitoring platform running on Linux Central Server. This security flaw affects the Centreon Open Tickets module and could allow authenticated attackers with low privileges to achieve significant impact across confidentiality, integrity, and availability of affected systems, with the ability to affect resources beyond the vulnerable component's scope.

Critical Impact

This vulnerability enables network-based attacks requiring only low-level privileges, with potential for cross-scope impact affecting confidentiality, integrity, and availability of the entire Centreon monitoring infrastructure.

Affected Products

• Centreon Open Tickets on Central Server (all versions before 25.10.3)
• Centreon Open Tickets on Central Server (versions before 24.10.8)
• Centreon Open Tickets on Central Server (versions before 24.04.7)

Discovery Timeline

• 2026-02-27 - CVE-2026-2749 published to NVD
• 2026-03-02 - Last updated in NVD database

Technical Details for CVE-2026-2749

Vulnerability Analysis

This vulnerability in the Centreon Open Tickets module represents a critical security risk for organizations using Centreon for IT infrastructure monitoring. The flaw allows authenticated attackers with minimal privileges to potentially compromise the affected system and extend their attack to resources beyond the vulnerable component's security scope.

The cross-scope nature of this vulnerability is particularly concerning, as successful exploitation could allow attackers to pivot from the Centreon monitoring platform to other connected systems and services within the organization's infrastructure. Monitoring systems like Centreon typically have privileged access to numerous network resources, making them high-value targets for attackers.

Root Cause

The specific root cause has not been publicly detailed by Centreon. Organizations should consult the Centreon Security Bulletin CVE-2026-2749 for comprehensive technical information about the underlying vulnerability mechanism.

Attack Vector

The vulnerability is exploitable over the network, requiring authentication with low-level privileges. No user interaction is required for successful exploitation. The attack complexity is low, meaning that once an attacker has valid credentials with minimal privileges, exploitation can be achieved without specialized conditions or significant effort.

The cross-scope impact indicates that successful exploitation could affect resources beyond the Centreon Open Tickets module itself, potentially compromising the confidentiality, integrity, and availability of connected systems and data accessible through the Centreon monitoring infrastructure.

Detection Methods for CVE-2026-2749

Indicators of Compromise

• Unusual activity or requests originating from low-privileged Centreon user accounts
• Unexpected modifications to ticket configurations or system files within the Centreon installation
• Anomalous network connections from the Centreon Central Server to internal resources
• Suspicious process execution or privilege escalation attempts on the Central Server

Detection Strategies

• Implement log monitoring for the Centreon Open Tickets module and Central Server authentication events
• Deploy network traffic analysis to identify unusual outbound connections from the Centreon infrastructure
• Monitor system integrity of Centreon configuration files and module components
• Configure alerting for unauthorized access attempts or privilege escalation patterns

Monitoring Recommendations

• Enable detailed logging for all Centreon module activities and user authentication events
• Establish baseline behavior profiles for Centreon user accounts and alert on deviations
• Implement file integrity monitoring (FIM) on the Centreon Central Server installation directories
• Review Centreon access logs regularly for signs of exploitation or reconnaissance activity

How to Mitigate CVE-2026-2749

Immediate Actions Required

• Upgrade Centreon Open Tickets to version 25.10.3, 24.10.8, or 24.04.7 depending on your current version branch
• Audit all user accounts with access to the Centreon Open Tickets module and revoke unnecessary privileges
• Implement network segmentation to limit the Centreon Central Server's access to critical resources
• Enable enhanced logging and monitoring on the Centreon infrastructure pending patch application

Patch Information

Centreon has released security patches to address this vulnerability. Organizations should upgrade to the following fixed versions based on their deployment:

• Version 25.10.3 for the 25.10.x branch
• Version 24.10.8 for the 24.10.x branch
• Version 24.04.7 for the 24.04.x branch

Detailed patch information and upgrade instructions are available in the Centreon Security Bulletin CVE-2026-2749.

Workarounds

• Restrict network access to the Centreon Central Server to trusted IP ranges only
• Implement additional authentication controls such as multi-factor authentication for Centreon access
• Limit the privileges of existing Centreon user accounts to the minimum necessary for their functions
• Consider temporarily disabling the Open Tickets module if not critical to operations until patching is complete

# Example: Restrict Centreon web access via iptables (adjust IP ranges as needed)
iptables -A INPUT -p tcp --dport 80 -s 10.0.0.0/8 -j ACCEPT
iptables -A INPUT -p tcp --dport 443 -s 10.0.0.0/8 -j ACCEPT
iptables -A INPUT -p tcp --dport 80 -j DROP
iptables -A INPUT -p tcp --dport 443 -j DROP