Cyber Resilience

CVE-2024-55590

RCE in Fortinet Fortiisolator 2.4.0 – 2.4.6

RCECommand Injection
Published
11 March 2025
Modified
23 July 2025
Patch / advisory
View advisory
CVSS Score v3.1 8.8
Click a component to see what it means
Raw vectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS Score 0.010 60th percentile
Risk Priority 66 floored blend · peak EPSS

Summary

CVE-2024-55590 is a high-severity OS Command Injection (CWE-78) vulnerability in Fortinet Fortiisolator. Its CVSS base score is 8.8 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Command and Scripting Interpreter (T1059); ranked in the top 40% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.

The strongest mitigations our analysis identified map to SA-11 (Developer Testing and Evaluation) and SI-10 (Information Input Validation) — see the control section below for these in your framework.

Deeper analysis AI-assisted summary

Synthesised by an AI model from the NVD description and linked references — a reading aid, not an authoritative source.

CVE-2024-55590 consists of multiple improper neutralization of special elements used in an OS command vulnerabilities, classified as OS Command Injection (CWE-78), affecting Fortinet FortiIsolator versions 2.4.0 through 2.4.5. These flaws arise from inadequate handling of special elements within CLI commands, enabling injection of malicious OS commands.

An authenticated attacker with at least read-only admin permissions and CLI access can exploit these vulnerabilities by submitting specifically crafted CLI commands, resulting in the execution of unauthorized code on the affected system. The CVSS v3.1 base score of 8.8 (AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H) reflects high severity, with network accessibility, low attack complexity, low privileges required, no user interaction, and high impacts on confidentiality, integrity, and availability.

Mitigation details are available in the Fortinet product security incident response advisory at https://fortiguard.fortinet.com/psirt/FG-IR-24-178.

OWASP Top 10 for Web (2025)

A05:2025 Injection

EU & UK References

Vulnerability Data

Multiple improper neutralization of special elements used in an OS command ('OS Command Injection') vulnerabilities [CWE-78] in Fortinet FortiIsolator version 2.4.0 through 2.4.5 allows an authenticated attacker with at least read-only admin permission and CLI access to execute unauthorized code…

more

via specifically crafted CLI commands.

CWE(s)
CWE-78

Related Threats

MITRE ATT&CK Enterprise Techniques

T1059 Command and Scripting Interpreter Execution
Adversaries may abuse command and script interpreters to execute commands, scripts, or binaries.
attack.mitre.org →
T1059.003 Windows Command Shell Execution
Adversaries may abuse the Windows command shell for execution.
attack.mitre.org →
T1059.004 Unix Shell Execution
Adversaries may abuse Unix shell commands and scripts for execution.
attack.mitre.org →
T1059.001 PowerShell Execution
Adversaries may abuse PowerShell commands and scripts for execution.
attack.mitre.org →
T1190 Exploit Public-Facing Application Initial Access
Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.
attack.mitre.org →
Derived from this CVE’s CWE(s) via the direct CWE→ATT&CK cross-walk.

CVEs Like This One

CVE-2024-54024Same product: Fortinet Fortiisolator
CVE-2024-54025Same product: Fortinet Fortiisolator
CVE-2024-32124Same product: Fortinet Fortiisolator
CVE-2024-32123Same vendor: Fortinet
CVE-2025-53949Same vendor: Fortinet
CVE-2026-39808Same vendor: Fortinet
CVE-2023-34988Same vendor: Fortinet
CVE-2023-34985Same vendor: Fortinet
CVE-2023-25607Same vendor: Fortinet
CVE-2023-23777Same vendor: Fortinet

Affected Assets

fortinet
fortiisolator
2.4.0 — 2.4.6

Mitigating Controls

Control response

Prevent
Stop it (NIST 800-53)

—

Detect
Catch it (NIST detect / respond)

—

Harden
Shrink the surface (DISA STIG)

—

Validate
Prove the fix (OWASP ASVS)
  • V1.2.5
  • V1.2.8
  • V15.2.5

Mitigating Controls (NIST 800-53 r5) AI

SA-11 Developer Testing and Evaluation good match

Developer testing and evaluation can discover missing or incorrect command sanitization during development.

SI-10 Information Input Validation good match

Input validation directly neutralizes or rejects special characters that would otherwise alter OS command structure.

AC-6 Least Privilege partial match

Least privilege reduces the permissions available to any process that could be subverted by injected commands.

CM-7 Least Functionality partial match

Least functionality restricts available OS commands and interpreters, limiting the blast radius of injection.

SA-8 Security and Privacy Engineering Principles partial match

Secure engineering principles require proper neutralization of untrusted input before command construction.

Mitigating Controls (NIST CSF 2.0) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.

PR.PS-06 mostly match
prevents

PR.PS-06's SDLC practices directly require secure coding and input handling that blocks command-injection defects, yet the single broad outcome leaves many specific neutralization vectors and verification gaps unaddressed.

PR.PS-02 partial match
prevents

Routine patching/maintenance can remediate known command-injection CVEs in dependencies (partial forward) but does nothing to stop developers from introducing improper neutralization in custom code (none reverse).

Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.

A.8.29 Security testing in development and acceptance mostly match
finds

Security testing and code review target insecure use of operating-system command interfaces, catching command-injection flaws introduced during development.

References