Fortinet Breach Incident Score: Analysis & Impact (FOR4002340112025)

In this Rankiteo incident briefing, we review the Fortinet breach identified under incident ID FOR4002340112025.

The analysis begins with a detailed overview of Fortinet's information like the linkedin page: https://www.linkedin.com/company/fortinet, the number of followers: 1167752, the industry type: Computer and Network Security and the number of employees: 15505 employees

After the initial compromise, the video explains how Rankiteo's incident engine converts technical details into a normalized incident score. The incident score before the incident was 635 and after the incident was 626 with a difference of -9 which is could be a good indicator of the severity and impact of the incident.

In the next step of the video, we will analyze in more details the incident and the impact it had on Fortinet and their customers.

On 18 November 2025, Fortinet disclosed Vulnerability Exploitation issues under the banner "Critical OS Command Injection Vulnerability in Fortinet’s FortiWeb (CVE-2025-58034)".

A critical OS command injection vulnerability (CVE-2025-58034) has been discovered in Fortinet’s FortiWeb security platform, allowing authenticated attackers with elevated privileges to execute arbitrary code via crafted HTTP requests or CLI commands.

The disruption is felt across the environment, affecting FortiWeb deployments running unpatched versions (pre-8.0.2, 7.6.6, 7.4.11, 7.2.12, 7.0.12).

In response, moved swiftly to contain the threat with measures like Upgrade to patched versions (8.0.2+, 7.6.6+, 7.4.11+, 7.2.12+, 7.0.12+), Restrict authenticated access to FortiWeb systems and Monitor logs for suspicious command execution patterns, and began remediation that includes Patch management (priority testing in non-production environments before deployment), Review historical logs for exploitation attempts and Verify system integrity on affected deployments.

The case underscores how Ongoing (active exploitation confirmed; organizations urged to check for compromise), teams are taking away lessons such as Critical vulnerabilities in security products can undermine enterprise defenses if left unpatched, Active exploitation elevates remediation priority regardless of CVSS score and Access controls and logging are essential mitigations when patching is delayed, and recommending next steps like Immediately inventory all FortiWeb deployments and verify versions, Prioritize patching in a staged rollout (non-production first) and Enforce least-privilege access and multi-factor authentication (MFA) for FortiWeb management interfaces, with advisories going out to stakeholders covering Fortinet has released comprehensive documentation, including CVRF and CSAF files, for customer integration into security tools.

Finally, we try to match the incident with the MITRE ATT&CK framework to see if there is any correlation between the incident and the MITRE ATT&CK framework.

The MITRE ATT&CK framework is a knowledge base of techniques and sub-techniques that are used to describe the tactics and procedures of cyber adversaries. It is a powerful tool for understanding the threat landscape and for developing effective defense strategies.

Rankiteo's analysis has identified several MITRE ATT&CK tactics and techniques associated with this incident, each with varying levels of confidence based on available evidence. Under the Initial Access tactic, the analysis identified Exploit Public-Facing Application (T1190) with high confidence (95%), with evidence including authenticated attackers with elevated privileges to execute arbitrary code via crafted HTTP requests, and active exploitation in real-world environments. Under the Execution tactic, the analysis identified Command-Line Interface (T1059.003) with high confidence (95%), with evidence including execute arbitrary code via crafted HTTP requests or **CLI commands**, and oS command injection vulnerability (CWE-78) and Unix Shell (T1059.004) with high confidence (90%), supported by evidence indicating oS command injection vulnerability (CWE-78) enabling **remote code execution (RCE)**. Under the Privilege Escalation tactic, the analysis identified Exploitation for Privilege Escalation (T1068) with moderate to high confidence (85%), supported by evidence indicating authenticated attackers with **elevated privileges** exploiting CVE-2025-58034 for **full system compromise**. Under the Defense Evasion tactic, the analysis identified File Deletion: Command History (T1070.004) with moderate to high confidence (70%), supported by evidence indicating verify system integrity on affected deployments (implies attacker may clear logs/command history). Under the Lateral Movement tactic, the analysis identified Remote Services: SSH (T1021.004) with moderate to high confidence (80%), supported by evidence indicating lateral movement within enterprise networks post-exploitation. Under the Collection tactic, the analysis identified Data from Local System (T1005) with moderate to high confidence (85%), supported by evidence indicating sensitive data exfiltration following **remote code execution**. Under the Exfiltration tactic, the analysis identified Exfiltration Over Alternative Protocol: Exfiltration Over Unencrypted/Obfuscated Non-C2 Protocol (T1048.003) with moderate to high confidence (80%), supported by evidence indicating sensitive data exfiltration via compromised FortiWeb systems. Under the Impact tactic, the analysis identified Data Encrypted for Impact (T1486) with lower confidence (30%), supported by evidence indicating operational disruption (potential, though not explicitly ransomware-related) and Inhibit System Recovery (T1490) with moderate to high confidence (70%), supported by evidence indicating complete system compromise may include disabling recovery mechanisms. These correlations help security teams understand the attack chain and develop appropriate defensive measures based on the observed tactics and techniques.