CVE-2026-24300 Overview
CVE-2026-24300 is an Elevation of Privilege vulnerability affecting Microsoft Azure Front Door. This critical flaw stems from improper access control (CWE-284), which could allow an attacker to escalate privileges within the Azure Front Door service environment without requiring authentication or user interaction.
Critical Impact
This vulnerability enables unauthenticated attackers to elevate privileges through the network, potentially gaining unauthorized access to protected resources and sensitive data within Azure environments.
Affected Products
- Microsoft Azure Front Door
Discovery Timeline
- February 5, 2026 - CVE-2026-24300 published to NVD
- February 5, 2026 - Last updated in NVD database
Technical Details for CVE-2026-24300
Vulnerability Analysis
This elevation of privilege vulnerability in Azure Front Door is rooted in improper access control mechanisms. The flaw can be exploited remotely over the network with low attack complexity, requiring no privileges or user interaction. An attacker successfully exploiting this vulnerability could gain elevated access to resources and functionality that should be restricted, potentially compromising the confidentiality, integrity, and availability of systems behind Azure Front Door.
Root Cause
The vulnerability is classified under CWE-284 (Improper Access Control), indicating that the affected component fails to properly restrict access to resources or functionality. This weakness allows unauthorized users to perform actions or access data beyond their intended permissions within the Azure Front Door service.
Attack Vector
The attack vector is network-based, meaning an attacker can exploit this vulnerability remotely without requiring local access to the target system. The low attack complexity and absence of required privileges or user interaction make this vulnerability particularly dangerous, as it can be exploited with minimal effort by unauthenticated remote attackers.
The vulnerability mechanism involves improper validation of access control policies within Azure Front Door. Due to insufficient authorization checks, an attacker can bypass security boundaries and elevate their privileges. For detailed technical information, refer to the Microsoft CVE-2026-24300 Advisory.
Detection Methods for CVE-2026-24300
Indicators of Compromise
- Unusual or unexpected privilege escalation events in Azure Front Door logs
- Unauthorized access attempts to protected backend resources
- Anomalous authentication patterns or access from unexpected sources
- Suspicious API calls or configuration changes within Azure Front Door
Detection Strategies
- Monitor Azure Activity Logs for unauthorized access control changes or privilege modifications
- Implement Azure Defender alerts for suspicious activity related to Front Door configurations
- Review Azure Front Door access logs for unusual traffic patterns or unauthorized resource access
- Enable Azure Security Center recommendations for identity and access management
Monitoring Recommendations
- Enable diagnostic logging for Azure Front Door and route logs to Azure Monitor or SIEM
- Configure alerts for access control policy modifications
- Monitor for lateral movement indicators within connected Azure resources
- Regularly audit Azure Front Door routing rules and security policies
How to Mitigate CVE-2026-24300
Immediate Actions Required
- Review the Microsoft CVE-2026-24300 Advisory for available patches and apply immediately
- Audit current Azure Front Door configurations for potential exploitation
- Implement network segmentation to limit exposure of critical backend resources
- Enable enhanced logging and monitoring for Azure Front Door instances
Patch Information
Microsoft has released information regarding this vulnerability. Organizations should consult the official Microsoft CVE-2026-24300 Advisory for specific patch guidance and apply security updates as soon as they become available. As this is a managed cloud service, Microsoft may apply patches automatically, but customers should verify their deployment status.
Workarounds
- Implement additional authentication layers (such as Azure AD Conditional Access) for resources behind Azure Front Door
- Apply the principle of least privilege for all Azure Front Door configurations
- Restrict access to Azure Front Door management interfaces using Azure RBAC
- Consider implementing Web Application Firewall (WAF) policies to add additional security controls
# Azure CLI - Review Front Door security configuration
az network front-door show --name <front-door-name> --resource-group <resource-group>
# Enable diagnostic logging for Azure Front Door
az monitor diagnostic-settings create --resource <front-door-resource-id> --name "SecurityLogs" --logs '[{"category": "FrontdoorAccessLog","enabled": true},{"category": "FrontdoorWebApplicationFirewallLog","enabled": true}]' --workspace <log-analytics-workspace-id>
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
