CVE-2026-19034
Received Received - Intake

Command Injection in Shibby Tomato Firmware

Publication date: 2026-08-06

Last updated on: 2026-08-06

Assigner: VulDB

Description
A vulnerability was determined in Shibby Tomato 1.28.0000. Affected by this vulnerability is the function new_qoslimit_stop of the file /tmp/qoslimittc_stop.sh. Executing a manipulation of the argument wan_iface can lead to os command injection. The attack can be launched remotely. The exploit has been publicly disclosed and may be utilized. This project is superseded by FreshTomato.

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Meta Information

Published
2026-08-06
Last Modified
2026-08-06
Generated
2026-08-06
AI Q&A
2026-08-06
EPSS Evaluated
N/A
NVD
CVE-2026-19034
EUVD
EUVD-2026-53844

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
shibby tomato 1.28.0000

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-77 The product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component.
CWE-78 The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.

Attack-Flow Graph

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Executive Summary

This is an OS command injection vulnerability in Shibby Tomato firmware version 1.28.0000. It allows authenticated web administrators to execute arbitrary root commands by manipulating the wan_iface NVRAM key. The flaw occurs because the wan_iface value is embedded without sanitization into a shell script that is later executed with root privileges.

Detection Guidance

Check if your Tomato firmware version is 1.28.0000 by running 'nvram show | grep wan_iface' on the device. Inspect the file /tmp/qoslimittc_stop.sh for unsanitized use of wan_iface. Look for unexpected files like /tmp/pwned_qoslimit_stop created by root.

Impact Analysis

An attacker with web admin credentials could gain full root access to the device. This could allow them to take control of the router, intercept network traffic, install malware, or use the device as part of a botnet. The attack requires admin access but can be triggered remotely.

Compliance Impact

This vulnerability allows authenticated web administrators to execute arbitrary OS commands with root privileges via command injection. This could lead to unauthorized access, data exfiltration, or system compromise, which may violate compliance requirements under GDPR (data protection) and HIPAA (health data security) by enabling unauthorized access to sensitive information.

Mitigation Strategies

Upgrade to FreshTomato firmware immediately. Disable the QoS bandwidth limit service if not needed. Restrict web admin access to trusted networks only. Monitor for suspicious activity or unauthorized file creation in /tmp.

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