OS Command Injection Vulnerability in Shibby Tomato Router Firmware
CVE-2026-19036

8.6HIGH

Key Information:

Vendor

Shibby

Status
Tomato
Vendor
CVE Published:
6 August 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-19036?

A security flaw has been identified in Shibby Tomato 1.28.0000, specifically within the function sub_40F88C located in the file /tmp/ppp/wanoptions. This vulnerability arises from improper handling of the ppp_custom argument, which allows remote attackers to execute arbitrary OS commands. The exploit for this vulnerability has been made publicly available, raising significant security concerns for users of affected versions. It is important to note that this project has been superseded by FreshTomato, which may offer a more secure alternative.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-2026-19036 - Proof of Concept

References

https://vuldb.com/vuln/386455
vdb-entrytechnical-description
https://vuldb.com/vuln/386455/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-19036
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
.