CVE-2025-54659

Medium

Published: 10 March 2026

Published

10 March 2026

Modified

09 April 2026

KEV Added

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Patch

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CVSS Score v3.1 5.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N

EPSS Score 0.0016 37.1th percentile

Risk Priority 12 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2025-54659 is a medium-severity Path Traversal (CWE-22) vulnerability in Fortinet Fortisoar Agent Communication Bridge. Its CVSS base score is 5.8 (Medium).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 37.1th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

The strongest mitigations our analysis identified are NIST 800-53 AC-3 (Access Enforcement) and SI-10 (Information Input Validation).

Deeper analysis

CVE-2025-54659 is an Improper Limitation of a Pathname to a Restricted Directory (Path Traversal) vulnerability (CWE-22) in Fortinet FortiSOAR Agent Communication Bridge version 1.1.0 and all versions of 1.0. The flaw allows an unauthenticated attacker to read files accessible to the "fortisoar" user on systems where the agent is deployed by sending a crafted request to the agent port. Published on 2026-03-10, it carries a CVSS v3.1 base score of 5.8 (AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N), indicating moderate severity with network accessibility, low attack complexity, no privileges or user interaction required, and low confidentiality impact in a scoped scenario.

An unauthenticated attacker who can reach the agent's listening port over the network can exploit this vulnerability remotely. By crafting a malicious request that traverses path restrictions, the attacker gains read access to arbitrary files permitted to the fortisoar user account on the host system, potentially exposing sensitive configuration data, logs, or other information depending on the deployment environment and permissions.

Fortinet has issued security advisory FG-IR-26-084, available at https://fortiguard.fortinet.com/psirt/FG-IR-26-084, which provides details on the vulnerability, affected versions, and recommended mitigation actions for security practitioners.

EU & UK References

🇪🇺 ENISA EUVD: EUVD-2025-208491

Vulnerability details

An Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') vulnerability [CWE-22] vulnerability in Fortinet FortiSOAR Agent Communication Bridge 1.1.0, FortiSOAR Agent Communication Bridge 1.0 all versions may allow an unauthenticated attacker to read files accessible to the…

fortisoar user on a system where the agent is deployed, via sending a crafted request to the agent port.

CWE(s): CWE-22

Related Threats

MITRE ATT&CK Enterprise TechniquesAI

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 →

T1005 Data from Local System Collection

Adversaries may search local system sources, such as file systems, configuration files, local databases, virtual machine files, or process memory, to find files of interest and sensitive data prior to Exfiltration.

attack.mitre.org →

Why these techniques?

Path traversal on network-exposed agent port enables remote unauthenticated file read from local system (T1005) via crafted requests to a public-facing service (T1190).

Confidence: HIGH · MITRE ATT&CK Enterprise v18.1