Several models of Netgear routers are affected by a publicly disclosed vulnerability that could allow hackers to take them over.

An exploit for the vulnerability was published Friday by a researcher who uses the online handle Acew0rm. He claims that he reported the flaw to Netgear in August, but didn’t hear back.

The issue stems from improper input sanitization in a form in the router’s web-based management interface and allows the injection and execution of arbitrary shell commands on an affected device.

The U.S. CERT Coordination Center (CERT/CC) at Carnegie Mellon University rated the flaw as critical, assigning it a score of 9.3 out of 10 in the Common Vulnerability Scoring System (CVSS).

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