EUVD-2026-20853Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Lifecycle Timeline
6DescriptionCVE.org
A security vulnerability has been detected in decolua 9router up to 0.3.47. The impacted element is an unknown function of the file /api of the component Administrative API Endpoint. The manipulation leads to authorization bypass. The attack is possible to be carried out remotely. The exploit has been disclosed publicly and may be used. Upgrading to version 0.3.75 is sufficient to resolve this issue. It is suggested to upgrade the affected component.
AnalysisAI
Remote authorization bypass in decolua 9router up to version 0.3.47 allows unauthenticated network attackers to access the Administrative API Endpoint (/api) without proper credentials, potentially exposing sensitive functionality. The vulnerability has publicly available exploit code and vendor-released patch version 0.3.75 is available, reducing real-world risk for patched deployments but creating urgency for unpatched instances given active public disclosures.
Technical ContextAI
The vulnerability resides in the Administrative API Endpoint (/api) of decolua 9router, a routing or network management component. The root cause is classified as CWE-639 (Authorization Bypass Through User-Controlled Key), indicating that the authentication or authorization mechanism fails to properly validate user privileges before granting access to administrative functions. The CVSS 4.0 vector shows this is a network-accessible endpoint (AV:N) with low attack complexity (AC:L) requiring no authentication (PR:N) or user interaction (UI:N), meaning any remote attacker can trigger the bypass. The affected product range spans all versions up to and including 0.3.47 per the CPE specification cpe:2.3:a:decolua:9router:*:*:*:*:*:*:*:*.
RemediationAI
Vendor-released patch: upgrade decolua 9router to version 0.3.75 or later, available at https://github.com/decolua/9router/releases/tag/v0.3.75. For organizations unable to patch immediately, restrict network access to the /api endpoint using firewall rules or reverse proxy authentication, limiting exposure to trusted administrative networks only. Verify the patch installation by confirming the application version and testing administrative API access with invalid credentials to confirm authorization checks are enforced. Review the advisory and fix details at https://github.com/decolua/9router/issues/431 and related commentary in the referenced GitHub commit.
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Unauthenticated information disclosure in 9Router (decolua/9router) through version 0.4.41 lets remote attackers read ev
Authentication bypass in 9Router (AI router & token saver) prior to 0.5.4 lets any authenticated user disable applicatio
Authorization-gate bypass in 9Router (decolua/9router) before 0.5.2 lets a remote unauthenticated attacker reach protect
Server-side request forgery in 9Router before 0.4.72 lets an authenticated (PR:L) or locally-connected user abuse the /v
Authentication bypass in 9Router (decolua/9router) versions prior to 0.5.2 lets remote unauthenticated attackers reach p
Authentication bypass in 9Router (decolua/9router) before 0.5.2 lets a remote unauthenticated attacker forge a 'Host: lo
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Same technique Authentication Bypass
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External POC / Exploit Code
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