Cudy WR3000 2.0 running firmware before 2.5.24 contains a hard-coded JWT HMAC signing secret vulnerability in the Mosquitto MQTT broker's authentication plugin that allows unauthenticated attackers to forge valid JWT tokens by extracting the secret from the firmware image. Attackers can use the extracted secret to craft arbitrary JWT tokens and authenticate to the MQTT broker without legitimate credentials, gaining unauthorized access to the device's mesh networking interface.

A vulnerability was identified in Cudy LT500E up to 2.3.12. Affected is an unknown function of the file /squashfs-root/etc/shadow of the component Web Interface. The manipulation leads to use of hard-coded password. The attack must be carried out locally. The attack's complexity is rated as high. The exploitability is told to be difficult. The exploit is publicly available and might be used. Upgrading to version 2.3.13 is able to address this issue. It is recommended to upgrade the affected component. The vendor explains: "[T]he firmware does store a default password of 'admin'. This password has been deprecated since LT500E firmware version 2.3.13 and is no longer used. The LT500E does not have an administrator password set by default; a new password (at least 8 characters ) must be manually created upon first login the web management page."

Cudy WR3000 2.0 running firmware before 2.5.24 contains an OS command injection vulnerability that allows authenticated attackers to execute arbitrary OS commands with root privileges by sending unsanitized input through the mesh MQTT command interface. The synccommand binary forwards unsanitized input directly to a shell execution sink in command.lua, enabling attackers with access to the MQTT broker to exploit the default-enabled command execution path to achieve full root-level system compromise.

Cudy LT300 3.0 running firmware prior to version 2.5.12 contains an OS command injection vulnerability that allows authenticated attackers to execute arbitrary commands by injecting shell metacharacters into the cbid.system.ntp.current POST parameter in the system time configuration interface. Attackers can submit malicious payloads through the NTP settings endpoint to achieve remote code execution on the underlying system.

Cudy LT400 1.13.4 is vulnerable Cross Site Scripting (XSS) in /cgi-bin/luci/admin/network/bandwidth via the icon parameter.

Cudy LT400 1.13.4 is vulnerable to Cross Site Scripting (XSS) in cgi-bin/luci/admin/network/wireless/config via the iface parameter.

Cudy LT400 1.13.4 is has a cross-site scripting (XSS) vulnerability in /cgi-bin/luci/admin/network/wireless/status via the iface parameter.

A security vulnerability has been detected in Cudy TR1200 1.16.3-20230804-164635. Impacted is an unknown function of the file /cgi-bin/luci/admin/network/wireless/config/ of the component Wireless Settings Page. Such manipulation of the argument SSID leads to cross site scripting. It is possible to launch the attack remotely. The exploit has been disclosed publicly and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

A vulnerability was determined in Cudy WR1200EA 2.3.7-20250113-121810. Affected is an unknown function of the file /etc/shadow. Executing manipulation can lead to use of default password. The attack needs to be launched locally. A high complexity level is associated with this attack. The exploitability is told to be difficult. The exploit has been publicly disclosed and may be utilized. The vendor was contacted early about this disclosure but did not respond in any way.

A vulnerability was determined in Cudy TR1200 R46-2.4.15-20250721-164017. Impacted is the function actionipsecconn of the file /usr/bin/lib/lua/luci/controller/ipsec.lua. Executing a manipulation can lead to command injection. The attack may be launched remotely. The exploit has been publicly disclosed and may be utilized. Upgrading the affected component is advised. The vendor explains, that "some other customer has reported this to us before. And we have fixed this."