VYPR

CWE-912

Hidden Functionality

ClassIncomplete

Description

The product contains functionality that is not documented, not part of the specification, and not accessible through an interface or command sequence that is obvious to the product's users or administrators.

Hidden functionality can take many forms, such as intentionally malicious code, "Easter Eggs" that contain extraneous functionality such as games, developer-friendly shortcuts that reduce maintenance or support costs such as hard-coded accounts, etc. From a security perspective, even when the functionality is not intentionally malicious or damaging, it can increase the product's attack surface and expose additional weaknesses beyond what is already exposed by the intended functionality. Even if it is not easily accessible, the hidden functionality could be useful for attacks that modify the control flow of the application.

Hierarchy (View 1000)

Parents

Related attack patterns (CAPEC)

CAPEC-133 · CAPEC-190

CVEs mapped to this weakness (86)

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  • CVE-2025-47729LowKEVMay 8, 2025
    risk 0.24cvss 1.9epss 0.00

    The TeleMessage archiving backend through 2025-05-05 holds cleartext copies of messages from TM SGNL (aka Archive Signal) app users, which is different functionality than described in the TeleMessage "End-to-End encryption from the mobile phone through to the corporate archive"…

  • CVE-2024-33583LowMay 14, 2024
    risk 0.21cvss 3.3epss 0.00

    A vulnerability has been identified in SIMATIC RTLS Locating Manager (6GT2780-0DA00) (All versions < V3.0.1.1), SIMATIC RTLS Locating Manager (6GT2780-0DA10) (All versions < V3.0.1.1), SIMATIC RTLS Locating Manager (6GT2780-0DA20) (All versions < V3.0.1.1), SIMATIC RTLS Locating…

  • CVE-2023-6614LowDec 8, 2023
    risk 0.18cvss 2.7epss 0.01

    A vulnerability classified as problematic was found in Typecho 1.2.1. Affected by this vulnerability is an unknown functionality of the file /admin/manage-pages.php of the component Page Handler. The manipulation leads to backdoor. The attack can be launched remotely. The…

  • CVE-2025-62773LowOct 22, 2025
    risk 0.16cvss 2.4epss 0.00

    Mercku M6a devices through 2.1.0 allow TELNET sessions via a router.telnet.enabled.update request by an administrator.

  • CVE-2026-18191CriJul 29, 2026
    risk 0.00cvss 9.8epss 0.00

    VIN-DS783E-E6 developed by Vacron has a Hidden Functionality vulnerability, allowing unauthenticated remote attackers to exploit a specific hidden function to obtain the administrator credentials of the device.

  • CVE-2026-4769CriJul 13, 2026
    risk 0.00cvss 9.8epss 0.00

    Certain devices in the WAGO System I/O Field series activate an internal diagnostic capability during the initial startup sequence. This functionality is not formally documented and becomes accessible without authentication for a brief period in the early boot phase. During this…