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CVE-2025-9090 is a remote command injection vulnerability affecting Tenda AC20 firmware version 16.03.08.12. The flaw is present in the Telnet Service component, specifically in the websFormDefine function associated with the /goform/telnet handler. Improper handling of attacker-controlled input allows crafted requests to inject and execute operating system commands. The vulnerable functionality is reachable remotely, making the issue exploitable over the network on exposed devices. Public exploit disclosure indicates that exploitation details are available.
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1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos (1 hidden).
This repository contains a C-language exploit for CVE-2025-9090, a command injection vulnerability in the Tenda AC20 router (firmware v16.03.08.12). The exploit targets the '/goform/telnet' HTTP endpoint, which, when accessed via a crafted POST request, enables the Telnet service on the device. The exploit then attempts to connect to ports 23 and 2323 to verify if Telnet access has been successfully enabled. The repository consists of three files: a LICENSE, a README.md with usage instructions and vulnerability details, and the main exploit code (exploit.c). The exploit is operational, providing a working method to remotely enable Telnet on vulnerable routers, thus allowing an attacker to gain shell access. No detection or fake code is present; the exploit is focused and functional.
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Cross-references every affected SKU, including bundled OEM variants.
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