OptiLink ONT1GEW GPON up to 2.1.11_X101 Build 1127.190306 Web Management Interface target_addr os command injection

Summaryinfo

A vulnerability labeled as critical has been found in OptiLink ONT1GEW GPON up to 2.1.11_X101 Build 1127.190306. Affected is an unknown function of the component Web Management Interface. The manipulation of the argument target_addr results in os command injection. This vulnerability is identified as CVE-2025-34049. The attack can be executed remotely. Additionally, an exploit exists.

Detailsinfo

A vulnerability was found in OptiLink ONT1GEW GPON up to 2.1.11_X101 Build 1127.190306. It has been classified as critical. Affected is an unknown part of the component Web Management Interface. The manipulation of the argument target_addr with an unknown input leads to a os command injection vulnerability. CWE is classifying the issue as CWE-78. The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

An OS command injection vulnerability exists in the OptiLink ONT1GEW GPON router firmware version V2.1.11_X101 Build 1127.190306 and earlier. The router’s web management interface fails to properly sanitize user input in the target_addr parameter of the formTracert and formPing administrative endpoints. An authenticated attacker can inject arbitrary operating system commands, which are executed with root privileges, leading to remote code execution. Successful exploitation enables full compromise of the device. Exploitation evidence was observed by the Shadowserver Foundation on 2025-02-04 UTC.

The weakness was released by SecNigma and Amal as 49955. The advisory is shared for download at exploit-db.com. This vulnerability is traded as CVE-2025-34049 since 04/15/2025. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation needs additional levels of successful authentication. Technical details and a public exploit are known. The MITRE ATT&CK project declares the attack technique as T1202.

The exploit is shared for download at exploit-db.com. It is declared as proof-of-concept.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2025-19206). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Vendor

• OptiLink

Name

• ONT1GEW GPON

Version

• 2.1.11_X101 Build 1127.190306

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VulDB is the best source for vulnerability data and more expert information about this specific topic.

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