Incident Score: Analysis & Impact (FORARC1765986943)

In this Rankiteo incident briefing, we review the Fortinet breach identified under incident ID FORARC1765986943.

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: 1232151, the industry type: Computer and Network Security and the number of employees: 15789 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 300 and after the incident was 297 with a difference of -3 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 09 December 2025, Fortinet disclosed Authentication Bypass issues under the banner "Exploitation of CVE-2025-59718 to Bypass Authentication on Fortinet FortiGate Firewalls".

Attackers are exploiting a recently revealed vulnerability (CVE-2025-59718) to bypass authentication on Fortinet’s FortiGate firewalls and export system configuration files.

The disruption is felt across the environment, affecting FortiGate firewalls, FortiProxy, FortiSwitchManager, FortiWeb, and exposing System configuration files (network/infrastructure details, firewall policies, encrypted/hashed passwords).

In response, moved swiftly to contain the threat with measures like Check logs for suspicious logins, reset compromised credentials, limit access to management interfaces, and began remediation that includes Upgrade to a fixed version of FortiOS/FortiProxy/FortiSwitchManager/FortiWeb or disable FortiCloud SSO login feature, and stakeholders are being briefed through Public disclosure by Fortinet and Arctic Wolf, CISA advisory.

The case underscores how Ongoing, teams are taking away lessons such as Organizations should promptly patch vulnerabilities, disable unnecessary features (e.g., FortiCloud SSO if unused), limit access to management interfaces, and monitor for suspicious activity, and recommending next steps like Upgrade to a non-vulnerable version of FortiOS/FortiProxy/FortiSwitchManager/FortiWeb, Disable FortiCloud SSO login feature if not in use and Reset hashed credentials if configuration files were exfiltrated, with advisories going out to stakeholders covering Fortinet and Arctic Wolf have issued advisories; CISA has mandated remediation for US federal agencies.

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.