OS Command Injection in Shibby Tomato Router Firmware
CVE-2026-19034

8.6HIGH

Key Information:

Vendor

Shibby

Status
Tomato
Vendor
CVE Published:
6 August 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-19034?

A significant vulnerability exists in Shibby Tomato 1.28.0000 within the function new_qoslimit_stop located in /tmp/qoslimittc_stop.sh. This flaw allows attackers to manipulate the wan_iface argument, potentially leading to unauthorized execution of operating system commands. An attacker can launch this exploit remotely, opening the door for possible unauthorized access and system compromise. The vulnerability has been publicly disclosed and poses a significant security risk, especially since this version is superseded by FreshTomato, indicating the urgency for users to migrate to a more secure alternative.

Affected Version(s)

Tomato 1.28.0000

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-19034 - Proof of Concept

References

https://vuldb.com/vuln/386453
vdb-entrytechnical-description
https://vuldb.com/vuln/386453/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-19034
third-party-advisory

CVSS V4

Score:
8.6
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

WH-YHUST (VulDB User)
VulDB CNA Team
.