Critical Fortinet FortiSandbox Vulnerability Enables Code Execution Attacks

Cybersecuritynews •Guru Baran • May 12, 2026

A critical security flaw in Fortinet’s FortiSandbox platform is putting enterprise networks at serious risk, allowing unauthenticated attackers to execute arbitrary code or commands remotely, with no credentials required. Fortinet disclosed the vulnerability on May 12, 2026, under the identifier CVE-2026-26083 (FG-IR-26-136), assigning it a CVSSv3 score of 9.1, placing it firmly in the critical […]

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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

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Critical Fortinet FortiSandbox Vulnerability Enables Code Execution Attacks

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