Authorization Bypass Vulnerability in Decolua 9Router Administrative API Endpoint
CVE-2026-5842

6.9MEDIUM

Key Information:

Vendor

Decolua

Status
9router
Vendor
CVE Published:
9 April 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-5842?

A security vulnerability has been discovered in Decolua's 9Router affecting versions up to 0.3.47. The issue lies within an unspecified function of the Administrative API Endpoint, where improper permissions allow for authorization bypass. This vulnerability can be exploited remotely, potentially enabling unauthorized access to sensitive functionalities. It is recommended to upgrade to version 0.3.75 or later to effectively address this security risk, as the exploit has been publicly disclosed and may be leveraged by adversaries.

Affected Version(s)

9router 0.3.0

9router 0.3.1

9router 0.3.2

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-2026-5842 - Proof of Concept

References

https://vuldb.com/vuln/356298
vdb-entry
https://vuldb.com/vuln/356298/cti
signaturepermissions-required
https://vuldb.com/submit/790003
third-party-advisory

CVSS V4

Score:
6.9
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
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

cyberthoth (VulDB User)
.