CVE-2021-34730

CVE-2021-34730 has been observed exploited in the wild (reported by VulnCheck KEV), including in ransomware campaigns. EIP tracks 1 public exploit from researchers including badmonkey7.

AI-analyzed exploit summary This repository contains a functional exploit for CVE-2021-34730, a stack-based buffer overflow in Cisco RV110W UPnP service. The exploit leverages the AddPortMapping action to achieve remote code execution (RCE) by overflowing a buffer in the upnp_osl_nat_config function.

A vulnerability in the Universal Plug-and-Play (UPnP) service of Cisco Small Business RV110W, RV130, RV130W, and RV215W Routers could allow an unauthenticated, remote attacker to execute arbitrary code or cause an affected device to restart unexpectedly, resulting in a denial of service (DoS) condition. This vulnerability is due to improper validation of incoming UPnP traffic. An attacker could exploit this vulnerability by sending a crafted UPnP request to an affected device. A successful exploit could allow the attacker to execute arbitrary code as the root user on the underlying operating system or cause the device to reload, resulting in a DoS condition. Cisco has not released software updates that address this vulnerability.