Shenzhen Cudy TR3000 up to 2.5.41 L2TP Credentials l2tp.sh net.set_wan username/password injection

Summaryinfo

A vulnerability was found in Shenzhen Cudy TR3000 up to 2.5.41 and classified as problematic. Affected by this vulnerability is the function net.set_wan of the file l2tp.sh of the component L2TP Credentials. Executing a manipulation of the argument username/password can lead to injection. This vulnerability is registered as CVE-2026-129105. It is possible to launch the attack remotely. No exploit is available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic was found in Shenzhen Cudy TR3000 up to 2.5.41. This vulnerability affects the function net.set_wan of the file l2tp.sh of the component L2TP Credentials. The manipulation of the argument username/password with an unknown input leads to a injection vulnerability. The CWE definition for the vulnerability is CWE-74. The product constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component. As an impact it is known to affect integrity, and availability. CVE summarizes:

Cudy TR3000 before 2.5.42 contains an option injection vulnerability that allows authenticated administrators to inject arbitrary pppd options by embedding quotes and newlines in L2TP credentials. Attackers can submit crafted usernames or passwords to the net.set_wan RPC method, which l2tp.sh writes into a pppd options file, adding options like logfile to the root pppd process.

The advisory is shared for download at cudy.com. This vulnerability was named CVE-2026-129105 since 11/13/2026. The exploitation appears to be easy. The attack can be initiated remotely. The exploitation requires an enhanced level of successful authentication. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1055.

Upgrading to version 2.5.42 eliminates this vulnerability.

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Productinfo

Vendor

• Shenzhen Cudy

Name

• TR3000

Version

• 2.5.0
• 2.5.1
• 2.5.2
• 2.5.3
• 2.5.4
• 2.5.5
• 2.5.6
• 2.5.7
• 2.5.8
• 2.5.9
• 2.5.10
• 2.5.11
• 2.5.12
• 2.5.13
• 2.5.14
• 2.5.15
• 2.5.16
• 2.5.17
• 2.5.18
• 2.5.19
• 2.5.20
• 2.5.21
• 2.5.22
• 2.5.23
• 2.5.24
• 2.5.25
• 2.5.26
• 2.5.27
• 2.5.28
• 2.5.29
• 2.5.30
• 2.5.31
• 2.5.32
• 2.5.33
• 2.5.34
• 2.5.35
• 2.5.36
• 2.5.37
• 2.5.38
• 2.5.39
• 2.5.40
• 2.5.41

CPE 2.3info

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CPE 2.2info

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