Cisco Small Business RV Series Routers Management Interface Remote Command Execution and Denial of Service Vulnerabilities

Vulnerability

The vulnerabilities exist in the web-based management interface of Cisco Small Business RV016, RV042, RV042G, RV082, RV320, and RV325 routers. They are caused by improper validation of user-supplied input when processing HTTP requests. Affected devices run firmware versions prior to the fixed releases detailed in the Cisco advisory [1].

Exploitation

An attacker must have valid administrator credentials on the targeted device. The attacker sends crafted HTTP requests to the web-based management interface. No additional user interaction is required beyond the authenticated session. The vulnerabilities can be exploited over the network.

Impact

Successful exploitation allows an attacker to execute arbitrary code as root on the underlying operating system or cause the device to reload unexpectedly, resulting in a denial of service (DoS) condition. The attacker gains full control of the router or disrupts its operation, compromising confidentiality, integrity, and availability.

Mitigation

Cisco has released free software updates that address these vulnerabilities, as referenced in the advisory [1]. Customers should upgrade to the fixed firmware versions. No workarounds are provided, but restricting access to the management interface to trusted networks can reduce exposure. There is no indication that these vulnerabilities are listed in the Known Exploited Vulnerabilities (KEV) catalog.