CVE-2026-15547 in Tomato
Summary
by MITRE • 07/13/2026
A weakness has been identified in Shibby Tomato up to 1.28.0000. This affects the function sub_2D048 of the component CIFS Mount Handler. Executing a manipulation of the argument cifs1/cifs2 can lead to os command injection. The attack can be executed remotely. The exploit has been made available to the public and could be used for attacks. This project is superseded by FreshTomato.
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Analysis
by VulDB Data Team • 07/13/2026
The vulnerability in Shibby Tomato version 1.28.0000 represents a critical command injection flaw within the CIFS Mount Handler component, specifically affecting the sub_2D048 function. This weakness arises from insufficient input validation when processing the cifs1/cifs2 arguments, creating an avenue for malicious actors to inject arbitrary operating system commands. The vulnerability exists in the network file sharing functionality that enables users to mount CIFS/SMB shares, making it particularly dangerous as it operates within a core system component responsible for remote file access and storage management.
The technical exploitation of this flaw occurs through manipulation of the cifs1/cifs2 parameters during the mounting process, where user-supplied input is directly incorporated into system commands without proper sanitization or encoding. This type of vulnerability falls under CWE-78, which specifically addresses OS Command Injection, a well-documented weakness that allows attackers to execute arbitrary commands on the underlying operating system. The remote execution capability means that an attacker does not require physical access to the device, as demonstrated by the public availability of exploit code that can be leveraged from external networks.
The operational impact of this vulnerability extends beyond simple command execution, as it could potentially enable full system compromise including privilege escalation, data exfiltration, and persistent backdoor installation. Attackers could leverage this weakness to gain unauthorized access to network shares, modify system configurations, or even establish persistent access to the affected device. The fact that this vulnerability affects a widely used router firmware means that numerous devices across various network environments could be compromised simultaneously, creating significant risk for both home users and enterprise networks relying on these systems.
Organizations should immediately implement mitigation strategies including disabling unused network services, applying firmware updates from FreshTomato which has superseded Shibby Tomato, and implementing network segmentation to limit potential attack vectors. The recommended approach involves replacing the vulnerable Shibby Tomato firmware with FreshTomato or another supported firmware variant that addresses this specific command injection vulnerability. Network monitoring should be enhanced to detect unusual command execution patterns, while access controls should be tightened to prevent unauthorized configuration changes to affected devices. This vulnerability demonstrates the critical importance of maintaining up-to-date firmware and conducting regular security assessments of network infrastructure components.
The broader implications of this vulnerability align with ATT&CK technique T1059.001 for Command and Scripting Interpreter, where adversaries execute commands on compromised systems. Additionally, it relates to ATT&CK tactic TA0002 (Execution) and TA0003 (Persistence), as the command injection could enable attackers to establish persistent access patterns through system modifications or backdoor installations. Given that many users may not regularly update their router firmware, this vulnerability represents a significant attack surface that requires immediate attention from both individual users and enterprise security teams to prevent potential exploitation across network environments.