FortiOS CLI Bypass Flaw Lets Attackers Run Arbitrary System Commands: CVE-2025-58325 (CVSS 7.8)

Estimated reading time: 7 minutes

Key Takeaways:

  • CVE-2025-58325 is a high-severity vulnerability affecting FortiOS.
  • Attackers with administrative privileges can execute unauthorized system commands.
  • Affected versions include FortiOS 7.6.0, 7.4.x, 7.2.x, 7.0.x, and 6.4.
  • Immediate patching or migration to a fixed release is recommended.
  • PurpleOps offers services to help organizations mitigate this and similar threats.

Table of Contents:

Fortinet has recently disclosed a security vulnerability, CVE-2025-58325, affecting its FortiOS operating system. This flaw could allow attackers with administrative privileges to execute unauthorized system commands by bypassing command line interface (CLI) restrictions. This poses a significant risk to organizations using vulnerable FortiOS versions.

Understanding the FortiOS CLI Bypass Vulnerability: CVE-2025-58325

The vulnerability, tracked as CVE-2025-58325, arises from an improper handling of specified functionality within the FortiOS CLI. This allows a local, authenticated attacker to execute arbitrary system commands through specifically crafted CLI inputs, effectively bypassing existing security controls. The Common Weakness Enumeration (CWE) classification for this issue is CWE-684 (Incorrect Provision of Specified Functionality). With a CVSS v3.1 score of 7.8, this vulnerability is classified as high severity.

Specifically, the vulnerability exists because of an incorrect provision of specified functionality, classified under CWE-684. This vulnerability exists in the FortiOS CLI component and enables local authenticated attackers to execute arbitrary system commands through specially crafted CLI inputs that bypass existing security controls.

The high CVSS score reflects the potential for complete system compromise. An attacker could leverage this vulnerability for privilege escalation, potentially impacting resources beyond the initially compromised component. While the attack requires local access and administrative privileges, the low attack complexity and lack of required user interaction make it relatively straightforward for threat actors to exploit once they have obtained the necessary credentials.

Impacted Versions and Remediation

Multiple FortiOS versions across several major release branches are vulnerable to this command injection flaw. Organizations running the following FortiOS versions should immediately prioritize patching:

  • 7.6.0
  • 7.4.0 through 7.4.5
  • 7.2.0 through 7.2.10
  • 7.0.0 through 7.0.15

For FortiOS 6.4, all versions are affected, and users should migrate to a fixed release since no patch is available for this end-of-life version.

Fortinet recommends organizations upgrade to FortiOS 7.6.1, 7.4.6, 7.2.11, or 7.0.16, depending on their current version branch, and advises using their upgrade path tool for proper migration planning.

FortiOS Version Affected Releases Recommended Action
7.6 7.6.0 Upgrade to 7.6.1 or above
7.4 7.4.0 through 7.4.5 Upgrade to 7.4.6 or above
7.2 7.2.0 through 7.2.10 Upgrade to 7.2.11 or above
7.0 7.0.0 through 7.0.15 Upgrade to 7.0.16 or above
6.4 6.4 all versions Migrate to a fixed release

Affected Hardware

The vulnerability impacts a wide range of Fortinet firewall models including the 100E/101E, 100F/101F, 1100E/1101E, 1800F/1801F, 2200E/2201E, 2600F/2601F, 3300E/3301E, 3400E/3401E, 3500F/3501F, 3600E/3601E, 3800D, 3960E, 3980E, 4200F/4201F, 4400F/4401F, 5001E, 6000F, 7000E, and 7000F series.

Other FortiGate models are not affected by this security issue.

Practical Takeaways and Actionable Advice

Technical Readers (System Administrators, Security Engineers):

  1. Immediate Patching: Prioritize patching vulnerable FortiOS versions as outlined in Fortinet’s advisory. Use the upgrade path tool for proper migration planning.
  2. Credential Review: Audit administrative accounts and enforce strong password policies, including multi-factor authentication (MFA), to mitigate the risk of credential compromise.
  3. Network Segmentation: Implement network segmentation to limit the potential impact of a successful exploit. This confines attackers to specific network segments, preventing lateral movement.
  4. Monitoring and Alerting: Enhance security monitoring and alerting rules to detect suspicious CLI activity. This includes monitoring for unusual commands or patterns indicative of exploitation attempts. Leverage a cyber threat intelligence platform to stay informed about emerging threats and indicators of compromise (IOCs) related to this vulnerability.
  5. Regular Security Audits: Conduct regular PurpleOps Solutions and security audits to identify and address vulnerabilities proactively.
  6. Implement a live ransomware API.
  7. Employ brand leak alerting.
  8. Consider a dark web monitoring service to identify compromised credentials.

Non-Technical Readers (Business Leaders, CISOs):

  1. Ensure Timely Patching: Verify that your IT teams are aware of the vulnerability and are actively implementing the recommended patches.
  2. Resource Allocation: Allocate sufficient resources to address cybersecurity risks, including vulnerability management and incident response capabilities.
  3. Security Awareness Training: Promote security awareness training among employees to recognize and avoid phishing attacks, which are often used to obtain administrative credentials.
  4. Incident Response Plan: Review and update your incident response plan to ensure it addresses potential exploitation of vulnerabilities like CVE-2025-58325.
  5. Understand Supply-Chain Risk Monitoring: Ensure that you can identify risks present in your supply chain and identify when your partners or suppliers are at risk.

How PurpleOps Can Help

PurpleOps offers a range of services that can help organizations address vulnerabilities like CVE-2025-58325 and enhance their overall cybersecurity posture. Our services include:

  • Cyber Threat Intelligence: Leverage our cyber threat intelligence platform to stay informed about emerging threats, vulnerabilities, and IOCs. Our platform provides real-time insights from various sources, including underground forum intelligence and telegram threat monitoring, to help you proactively identify and mitigate risks.
  • Penetration Testing: Our expert PurpleOps Solutions and PurpleOps Solutions teams can help you identify vulnerabilities in your systems and applications before attackers do. We simulate real-world attacks to assess your security controls and provide actionable recommendations for improvement.
  • Vulnerability Management: We offer comprehensive vulnerability management services to help you identify, prioritize, and remediate vulnerabilities in your environment. Our services include vulnerability scanning, risk assessment, and patch management.
  • Breach Detection: Implement comprehensive PurpleOps Solutions capabilities to identify and respond to intrusions.

PurpleOps’ expertise in PurpleOps Solutions allows you to assess the security posture of your vendors and partners, identifying potential weaknesses that could be exploited. Our real-time ransomware intelligence helps you stay ahead of ransomware threats, enabling you to implement proactive measures to protect your systems and data.

By leveraging PurpleOps’ services, organizations can strengthen their defenses against cyber threats and minimize the risk of exploitation.

To learn more about how PurpleOps can help you protect your organization from cyber threats, explore our services at PurpleOps Solutions or contact us for more information at https://www.purple-ops.io/platform/.

FAQ

Q: What is CVE-2025-58325?

A: CVE-2025-58325 is a high-severity vulnerability in FortiOS that allows attackers with administrative privileges to execute unauthorized system commands.

Q: Which FortiOS versions are affected?

A: Affected versions include FortiOS 7.6.0, 7.4.0 through 7.4.5, 7.2.0 through 7.2.10, 7.0.0 through 7.0.15, and 6.4 (all versions).

Q: What is the recommended action?

A: Upgrade to FortiOS 7.6.1, 7.4.6, 7.2.11, or 7.0.16, depending on your current version branch. For FortiOS 6.4, migrate to a fixed release.

Q: How can PurpleOps help?

A: PurpleOps offers cyber threat intelligence, penetration testing, vulnerability management, and breach detection services to help organizations mitigate this and similar threats.