CVE-2024-50571 Overview
CVE-2024-50571 is a heap-based buffer overflow vulnerability [CWE-122] affecting multiple Fortinet products, including FortiAnalyzer, FortiAnalyzer Cloud, FortiManager, FortiManager Cloud, FortiOS, and FortiProxy. An authenticated attacker with high privileges can send specifically crafted requests over the network to trigger the overflow. Successful exploitation allows execution of unauthorized code or commands on the affected device. The flaw impacts confidentiality, integrity, and availability across all supported Fortinet product lines listed in advisory FG-IR-24-442.
Critical Impact
Successful exploitation enables arbitrary code or command execution on Fortinet security infrastructure, potentially compromising the trust boundary of the entire managed network.
Affected Products
- Fortinet FortiAnalyzer 6.0 through 7.6.2 and FortiAnalyzer Cloud 6.4 through 7.4.5
- Fortinet FortiManager 6.0 through 7.6.1 and FortiManager Cloud 6.4 through 7.6.2
- Fortinet FortiOS 6.2 through 7.6.2 and FortiProxy 1.0 through 7.6.1
Discovery Timeline
- 2025-10-14 - CVE-2024-50571 published to NVD
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2024-50571
Vulnerability Analysis
The vulnerability is a heap-based buffer overflow classified under [CWE-122]. It exists in shared code paths across FortiAnalyzer, FortiManager, FortiOS, and FortiProxy. An attacker with high privileges on the target system can send specifically crafted requests that cause the affected process to write beyond an allocated heap buffer. This memory corruption can be steered into control-flow hijacking, resulting in execution of attacker-supplied code or commands. Because the vulnerable code is present in Fortinet management and gateway products, exploitation grants a foothold on devices that mediate security policy and traffic inspection for the enterprise network.
Root Cause
The root cause is improper validation of request-supplied data sizes before copying into a fixed-size heap allocation. When input length exceeds the destination buffer capacity, adjacent heap metadata and object pointers are corrupted. Fortinet has not publicly disclosed the specific component or function containing the flaw beyond the reference to advisory FG-IR-24-442.
Attack Vector
The attack vector is network-based and requires authenticated access with high privileges. The user interaction requirement is none, and the scope is unchanged. An attacker who has obtained administrator-level credentials, or who has escalated to that level through a prior compromise, can send crafted requests to the management interface to trigger the overflow. Refer to the Fortinet Security Advisory FG-IR-24-442 for further technical context.
Detection Methods for CVE-2024-50571
Indicators of Compromise
- Unexpected daemon crashes or restarts on FortiAnalyzer, FortiManager, FortiOS, or FortiProxy management processes.
- Anomalous administrator-authenticated sessions issuing malformed or oversized requests to the management API or CLI service.
- New or unexplained processes, outbound connections, or persistence artifacts originating from the Fortinet appliance.
Detection Strategies
- Monitor Fortinet system logs for repeated segmentation faults, memory allocation errors, or process termination events on management daemons.
- Baseline administrative API usage and alert on high-privilege sessions producing atypical payload sizes or request structures.
- Correlate authentication events with subsequent configuration changes or file writes on the appliance to identify post-exploitation activity.
Monitoring Recommendations
- Forward FortiOS, FortiManager, and FortiAnalyzer logs to a centralized SIEM and retain them for post-incident forensics.
- Alert on any successful administrator logins from unexpected source addresses, followed by CLI or REST API activity.
- Track version and build strings across the fleet to identify unpatched devices exposed to CVE-2024-50571.
How to Mitigate CVE-2024-50571
Immediate Actions Required
- Upgrade all affected FortiAnalyzer, FortiAnalyzer Cloud, FortiManager, FortiManager Cloud, FortiOS, and FortiProxy instances to the fixed releases specified in FG-IR-24-442.
- Restrict management interface access to trusted administrative networks and enforce multi-factor authentication for all administrative accounts.
- Rotate credentials and review audit logs on any device where suspicious administrator activity is observed.
Patch Information
Fortinet has published fixed versions and remediation guidance in the Fortinet Security Advisory FG-IR-24-442. Administrators should consult the advisory for the exact upgrade target that corresponds to each affected product and branch, then apply patches through the vendor-supported upgrade path.
Workarounds
- Limit exposure of the management plane by disabling HTTPS and SSH administrative access on untrusted interfaces.
- Apply trusted host restrictions to administrator accounts so that only specific source IP addresses can authenticate.
- Reduce the number of accounts with high-privilege roles and audit privileged access regularly until patches are deployed.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
