Fortinet Breach Incident Score: Analysis & Impact (FOR3793237111925)

In this Rankiteo incident briefing, we review the Fortinet breach identified under incident ID FOR3793237111925.

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 637 and after the incident was 621 with a difference of -16 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.

Organizations using Fortinet FortiWeb recently reported "Critical OS Command Injection Vulnerability in Fortinet FortiWeb (CVE-2025-58034) Actively Exploited", a noteworthy cybersecurity incident.

The Cybersecurity and Infrastructure Security Agency (CISA) has issued an urgent alert regarding a critical OS command injection vulnerability in Fortinet FortiWeb (CVE-2025-58034).

The disruption is felt across the environment, affecting Fortinet FortiWeb appliances and Potentially protected infrastructure behind the firewall.

In response, moved swiftly to contain the threat with measures like Network segmentation to restrict management access and Discontinuing use of affected product if patches/workarounds are insufficient, and began remediation that includes Apply security patches provided by Fortinet, Follow BOD 22-01 guidance for cloud deployments and Verify FortiWeb version and cross-reference with Fortinet’s advisory, and stakeholders are being briefed through CISA alert issued, Fortinet advisory published and Public disclosure via media (e.g., Google News, LinkedIn, X).

The case underscores how Ongoing (active exploitation confirmed; remediation urged), teams are taking away lessons such as Critical vulnerabilities in security products (e.g., WAFs) can enable broad exploitation if unpatched, Active exploitation underscores the need for immediate patching and mitigation and Network segmentation and monitoring are essential temporary controls when patches cannot be deployed promptly, and recommending next steps like Apply Fortinet-provided patches immediately, Implement network segmentation to restrict FortiWeb management access and Enhance monitoring for suspicious CLI commands and authentication attempts, with advisories going out to stakeholders covering CISA alert for federal and private sector stakeholders and Fortinet customer advisory.

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 Valid Accounts: Local Accounts (T1078.003) with high confidence (95%), supported by evidence indicating authenticated attackers with access to the management interface or API. Under the Execution tactic, the analysis identified Command and Scripting Interpreter: Unix Shell (T1059.004) with high confidence (100%), with evidence including execute arbitrary OS commands via malicious HTTP requests or CLI inputs, and oS command injection vulnerability (CWE-78). Under the Privilege Escalation tactic, the analysis identified Exploitation for Privilege Escalation (T1068) with high confidence (95%), with evidence including allows authenticated attackers to execute unauthorized code on affected systems, and full control over the FortiWeb appliance. Under the Defense Evasion tactic, the analysis identified Indicator Removal: File Deletion (T1070.004) with moderate to high confidence (70%), supported by evidence indicating bypassing security controls and potentially compromising the entire appliance and Impair Defenses: Disable or Modify Tools (T1562.001) with moderate to high confidence (80%), supported by evidence indicating compromise of web application firewall functionality. Under the Lateral Movement tactic, the analysis identified Remote Services: SSH (T1021.004) with moderate to high confidence (80%), supported by evidence indicating enabling lateral movement into protected internal networks behind the firewall. Under the Impact tactic, the analysis identified Endpoint Denial of Service: Application or System Exploitation (T1499.004) with high confidence (90%), with evidence including potential operational disruption if left unpatched, and full infrastructure compromise. These correlations help security teams understand the attack chain and develop appropriate defensive measures based on the observed tactics and techniques.