CVE-2026-19035
Received Received - Intake

Command Injection in Shibby Tomato Router Firmware

Publication date: 2026-08-06

Last updated on: 2026-08-06

Assigner: VulDB

Description
A vulnerability was identified in Shibby Tomato 1.28.0000. Affected by this issue is the function new_qoslimit_start of the file /etc/qoslimit. The manipulation of the argument new_qoslimit_enable leads to os command injection. The attack may be initiated remotely. The exploit is publicly available and might be used. This project is superseded by FreshTomato.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-2026-19035
EUVD
EUVD-2026-53867

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 affects the new_qoslimit_start function in the /etc/qoslimit file. The flaw allows authenticated web administrators with access to the QoS bandwidth limiting feature to execute arbitrary root commands.

Detection Guidance

Check if your Tomato firmware version is 1.28.0000 by running 'nvram show | grep tomato_version' on the device. Inspect the /etc/qoslimit file for unsanitized NVRAM keys like wan_iface or qos_ibw. Look for unexpected files in /tmp such as /tmp/pwned_qoslimit_start as a potential indicator of exploitation.

Impact Analysis

An attacker with web admin credentials could execute arbitrary commands with root privileges. This could lead to full system compromise, data theft, or unauthorized modifications to the device configuration.

Compliance Impact

This vulnerability could lead to unauthorized access and data breaches, which may violate compliance requirements such as GDPR or HIPAA. Organizations using affected firmware may face regulatory penalties and reputational damage.

Mitigation Strategies

Upgrade to FreshTomato firmware immediately as it supersedes Shibby Tomato. If upgrading is not possible, disable the QoS bandwidth limiting feature in the web interface and restrict web admin access to trusted networks only. Review and sanitize all NVRAM inputs used in /etc/qoslimit to prevent command injection.

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