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FG-IR-26-141

fortiguard.fortinet.com • July 23, 2026

An improper neutralization of special elements used in an OS command vulnerability [CWE-78] in FortiSandbox, FortiSandbox Cloud and FortiSandbox PaaS WEB UI may allow an unauthenticated attacker to execute unauthorized commands via specifically crafted HTTP requests.

2026-06-09: Initial publication

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This article is one source in a clustered incident — the cluster page carries the summary, timeline and every other outlet covering it.

Critical RCE Vulnerabilities Discovered in Fortinet Products Fortinet has identified multiple critical vulnerabilities in its FortiSandbox and FortiAuthenticator products, which could allow unauthenticated attackers to execute arbitrary code remotely. The vulnerabilities are tracked as CVE-2026-44277 and CVE-2026-26083, both published on May 12, 2026. FortiAuthenticator's flaw stems from improper access control, while FortiSandbox suffers from a missing authorization issue. These vulnerabilities affect various versions of FortiAuthenticator and FortiSandbox, with a CVSS score of 9.1 indicating their critical nature. Although no active exploitation has been reported, Fortinet's products have been frequently targeted in the past, raising concerns about potential future attacks. Administrators are urged to apply patches immediately to mitigate risks. Fortinet's advisory emphasizes the importance of maintaining updated systems to prevent exploitation. 60 sources 73

Extracted Entities

FG-IR-26-141

The full story

Extracted Entities

Attack Types (1)

CWE Weaknesses (1)

MITRE ATT&CK (1)

Platforms (3)