Incident Score: Analysis & Impact (FOR1770746047)
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Rankiteo Score Impact Analysis
Key Highlights From The Incident Analysis
- Timeline of Fortinet's Vulnerability and lateral movement inside company's environment.
- Overview of affected data sets, including SSNs and PHI, and why they materially increase incident severity.
- How Rankiteo’s incident engine converts technical details into a normalized incident score.
- How this cyber incident impacts Fortinet Rankiteo cyber scoring and cyber rating.
- Rankiteo’s MITRE ATT&CK correlation analysis for this incident, with associated confidence level.
Full Incident Analysis Transcript
In this Rankiteo incident briefing, we review the Fortinet breach identified under incident ID FOR1770746047.
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 256 and after the incident was 253 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.
Fortinet recently reported "Fortinet Patches High-Severity Authentication Bypass Flaw in FortiOS", a noteworthy cybersecurity incident.
Fortinet has disclosed a high-severity authentication bypass vulnerability in FortiOS, identified as CVE-2026-22153 (FG-IR-25-1052), which could allow unauthenticated attackers to bypass LDAP authentication for Agentless VPN or Fortinet Single Sign-On (FSSO) policies.
The disruption is felt across the environment, affecting FortiOS 7.6.0 through 7.6.4, SSL-VPN components.
In response, moved swiftly to contain the threat with measures like Upgrade to FortiOS 7.6.5 or later, disable unauthenticated binds on LDAP servers, and began remediation that includes Patching to FortiOS 7.6.5 or later, and stakeholders are being briefed through Public advisory issued by Fortinet.
The case underscores how Patched, and recommending next steps like Immediate patching for exposed SSL-VPN deployments, disable unauthenticated LDAP binds as a temporary workaround, with advisories going out to stakeholders covering Fortinet urges immediate patching for enterprise environments relying on LDAP integration.
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.
MITRE ATT&CK® Correlation Analysis
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 (90%), with evidence including high-severity authentication bypass vulnerability in FortiOS, and exploitation requires network accessibility and Valid Accounts (T1078) with moderate to high confidence (80%), with evidence including bypass LDAP authentication for Agentless VPN or FSSO policies, and unauthenticated attackers gain unauthorized access. Under the Credential Access tactic, the analysis identified Brute Force: Password Guessing (T1110.001) with moderate to high confidence (70%), with evidence including improper handling of LDAP authentication requests, and anonymous binds permitted on LDAP servers and Modify Authentication Process: Multi-Factor Authentication (T1556.006) with moderate confidence (60%), supported by evidence indicating bypass LDAP authentication for Fortinet Single Sign-On (FSSO) policies. Under the Defense Evasion tactic, the analysis identified Modify Authentication Process (T1556) with moderate to high confidence (80%), with evidence including authentication bypass vulnerability in FortiOS (CVE-2026-22153), and improper access control via SSL-VPN components. Under the Lateral Movement tactic, the analysis identified Remote Services: SSH (T1021.004) with moderate to high confidence (70%), supported by evidence indicating unauthorized entry into protected networks via SSL-VPN components. These correlations help security teams understand the attack chain and develop appropriate defensive measures based on the observed tactics and techniques.
Sources & References
- Fortinet Rankiteo Cyber Incident Details: https://www.rankiteo.com/company/fortinet/incident/FOR1770746047
- Fortinet CyberSecurity Rating page: https://www.rankiteo.com/company/fortinet
- Fortinet Rankiteo Cyber Incident Blog Article: https://blog.rankiteo.com/for1770746047-fortinet-vulnerability-february-2026/
- Fortinet CyberSecurity Score History: https://www.rankiteo.com/company/fortinet/history
- Fortinet CyberSecurity Incident Source: https://cybersecuritynews.com/fortios-ldap-authentication-bypass-vulnerability/
- Rankiteo A.I CyberSecurity Rating methodology: https://www.rankiteo.com/Images/rankiteo_algo.pdf
- Rankiteo TPRM Scoring methodology: https://static.rankiteo.com/model/rankiteo_tprm_methodology.pdf