Link Factory - Backdoor

The Link Factory WordPress plugin is a backdoor. Distributed as a "homepage sentence publisher", it exposes an operator-controlled REST API under /wp-json/link-factory/v1/ - authenticated by a detached Ed25519 signature verified against a hardcoded operator public key (except for the health check).

Premium SEO - Unauthenticated Backdoor (Admin Creation / RCE / SSRF / Content Injection)

The Premium SEO WordPress plugin is malicious: it ships an unauthenticated backdoor that creates a hidden administrator account and, in some builds, also enables remote code execution, server-side request forgery and arbitrary front-end script/content injection, giving an unauthenticated attacker full control of the affected site.

Supsystic Multiple Pro Plugins - Backdoor via Compromised Vendor Update Server

Multiple Supsystic Pro plugins were distributed with malicious code through the vendor's compromised update server, allowing unauthenticated attackers to deploy a second-stage payload that exfiltrates credentials and other sensitive data and grants full control of affected sites.

Undocumented backdoor allows authentication bypass in Magistra software

Magistra software contains undocumented backdoor functionality that allows authentication bypass and the creation of a privileged user account without credential verification.

D-Link DIR-505 Web Management CGI secmark1524.cgi main backdoor

A weakness has been identified in D-Link DIR-505 1.10B02. The impacted element is the function main of the file /secmark1524.cgi of the component Web Management CGI. This manipulation of the argument accu/pass/code/hash/cmds causes backdoor. The attack is possible to be carried out remotely. The exploit has been made available to the public and could be used for attacks.

DJI CrystalSky ZS600C USB-gadget backdoor allows root command execution

Hidden functionality (undocumented backdoor) in the root-privileged 'assistant' daemon in DJI CrystalSky ZS600C firmware v0.3.9.7 through v0.6.6.9 on Android allows a physically-present attacker with USB access to execute arbitrary OS commands as root by sending the hard-coded magic string 'dji26656677' to the USB-gadget serial interface (/dev/ttyGS0), after which each subsequent line is passed to system().

Denial of service via the undocumented subfunction in AS320T

Delta Electronics AS320T has denial of service via the undocumented subfunction vulnerability.

Unauthorized Firmware Upgrade in Atsumi Electric DVRs

Hidden functionality issue exists in Multiple DVRs (Digital Video Recorders) provided by Atsumi Electric Co., Ltd. A user who can log in to the product with the administrator privilege may upgrade the affected product to unauthorized firmware.

Remote Code Execution via Hidden Administrator Functionality in Atsumi DVRs

Hidden functionality issue exists in Multiple DVRs (Digital Video Recorders) provided by Atsumi Electric Co., Ltd. A user who can log in to the product with the administrator privilege may execute arbitrary OS commands.

Netis EAP930 CGI Endpoint debug return200 backdoor

A security vulnerability has been detected in Netis EAP930 1.250905.115454. This issue affects the function return200 of the file /cgi-bin/debug of the component CGI Endpoint. The manipulation of the argument SIGNATURE leads to backdoor. The attack may be initiated remotely. A high degree of complexity is needed for the attack. The exploitability is assessed as difficult. The vendor was contacted early about this disclosure but did not respond in any way.

Hidden accounts or hard-coded credentials may permit unauthorized access without the legitimate authentication process

Hitachi Coding Software Suite contains a vulnerability related to Hidden Functionality vulnerability which allows an attacker to gain unauthorized access by exploiting hidden accounts or hard coded credentials. This issue affects Hitachi Coding Software Suite: through 3.3.0.

Hidden functionality issue exists in FF-RFI079I4 and FF-RFI078I4, which may allow a user who can log in via SSH and access the enable mode on the product to execute arbitrary OS commands.

Pulsetto Vagus Nerve Stimulator Hidden Functionality

The firmware of the Pulsetto Vagus Nerve Stimulator accepts several undisclosed commands over its Bluetooth Low Energy (BLE) interface. These commands are sent without authentication or encryption, and are never issued by the companion mobile application, yet are fully processed by the device when it is powered on.

Cisco Firepower Threat Defense Software Hidden Commands Vulnerability

A vulnerability in the CLI of Cisco Firepower Threat Defense (FTD) Software could allow an authenticated, local attacker to access hidden commands. The vulnerability is due to the presence of undocumented configuration commands. An attacker could exploit this vulnerability by performing specific steps that make the hidden commands accessible. A successful exploit could allow the attacker to make configuration changes to various sections of an affected device that should not be exposed to CLI access.

Hidden Functionality Enables Remote Telnet Activation via /goform/setSysTools in Nexxt Nebula 300+

Hidden functionality in the /goform/setSysTools endpoint in Nexxt Solutions Nebula 300+ firmware through version 12.01.01.37 allows remote enablement of a Telnet service. By sending a crafted POST request with parameters such as telnetManageEn=true and telnetPwd, an authenticated attacker can activate a Telnet service on port 23.

MonsterInsights Pro 10.2.0/10.2.2 - Backdoored via AWS S3 bucket compromise

The official MonsterInsights Pro update distribution bucket (`monster-insights.s3.amazonaws.com`) was compromised. Both the current release (10.2.2) and the version MonsterInsights rolled back to (10.2.0) contain a malicious file, `class-system-check.php`. Three distinct variants were observed on 2026-06-11, all sharing the same AES-256-GCM key, confirming a single threat actor. The attacker retains write access to the S3 bucket and has been actively iterating on the payload throughout the day.

Puwell IP Camera 2.x - 4.x Unauthenticated Command Injection via DebugShell

Puwell IP Camera firmware versions 2.x through 4.x contains an unauthenticated command injection vulnerability that allows remote attackers to execute arbitrary operating system commands by sending a crafted JSON payload to the DebugShell interface exposed on TCP port 34567. Attackers can exploit the lack of authentication and input sanitization in the binary protocol service to pass arbitrary commands directly to the underlying operating system, achieving root-level code execution and complete device compromise.

Vacron｜IP Camera - Hidden Functionality

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.

Unauthenticated Access to Internal Diagnostic Interface

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 window, an unauthenticated remote attacker can gain access to the internal system processes, resulting in full system compromise.

PAX Android based POS devices with PayDroid_8.1.0_Sagittarius_V11.1.45_20230314 or earlier can allow the signed partition overwrite and subsequently local code execution via hidden command. The attacker must have physical USB access to the device in order to exploit this vulnerability.