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

Vulnerability

Multiple vulnerabilities exist in the web-based management interface of Cisco Small Business RV016, RV042, RV042G, RV082, RV320, and RV325 routers [1]. The issue stems from improper validation of user-supplied input in the web-based management interface. An attacker must have valid administrator credentials to exploit the vulnerability [1]. Affected devices are those running firmware versions prior to the fixed releases provided by Cisco [1].

Exploitation

An authenticated remote attacker with administrator privileges can exploit these vulnerabilities by sending crafted HTTP requests to the affected device's web-based management interface [1]. No additional user interaction or race window is required. The attacker needs network access to the management interface of the vulnerable device.

Impact

Successful exploitation allows an attacker to execute arbitrary code as the root user on the underlying operating system or cause the device to reload, resulting in a denial of service (DoS) condition [1]. This results in full compromise of the device's confidentiality, integrity, and availability.

Mitigation

Cisco has released free software updates to address these vulnerabilities [1]. Customers are advised to upgrade to the fixed firmware versions as specified in the Cisco Security Advisory. There are no workarounds available; upgrading is the only recommended mitigation. The vulnerabilities are not listed on CISA's Known Exploited Vulnerabilities (KEV) catalog as of the publication date.