Stack-Based Buffer Overflow in Shibby Tomato Firmware by Shibby
CVE-2026-15544

8.7HIGH

Key Information:

Vendor

Shibby

Status
Tomato
Vendor
CVE Published:
13 July 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-15544?

A vulnerability has been identified in the Shibby Tomato firmware affecting the function getupsvar within the apcupsd component. The flaw, which leads to a stack-based buffer overflow, can be exploited remotely when malformed arguments are passed. This issue is particularly critical given its public disclosure, allowing attackers to potentially leverage it against vulnerable systems. Shibby Tomato has since been succeeded by FreshTomato, urging users to update to ensure their devices are secure.

Affected Version(s)

Tomato 1.0

Tomato 1.1

Tomato 1.2

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-2026-15544 - Proof of Concept

References

https://vuldb.com/vuln/377894
vdb-entrytechnical-description
https://vuldb.com/vuln/377894/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-15544
third-party-advisory

CVSS V4

Score:
8.7
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

VulDB Gitee Analyzer
VulDB CNA Team
.