CVE-2025-57296: tenda ac6_firmware Command Injection

Vulnerability summary

CVE-2025-57296 is a medium (CVSS 6.5) Command Injection vulnerability in tenda ac6_firmware. EPSS estimates a 3.29% chance of exploitation in the next 30 days, higher than 88.4% of scored vulnerabilities. 1 public exploit is recorded.

Timeline

1. 19-09-2025
   PublishedVulnerability first disclosed.
2. 19-09-2025
   Last modifiedVulnerability information updated.

Description

Tenda AC6 router firmware 15.03.05.19 contains a command injection vulnerability in the formSetIptv function, which processes requests to the /goform/SetIPTVCfg web interface. When handling the list and vlanId parameters, the sub_ADBC0 helper function concatenates these user-supplied values into nvram set system commands using doSystemCmd, without validating or sanitizing special characters (e.g., ;, ", #). An unauthenticated or authenticated attacker can exploit this by submitting a crafted POST request, leading to arbitrary system command execution on the affected device.

• CWE-77Improper Neutralization of Special Elements used in a Command ('Command Injection')The product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component.