CVE-2021-34730: Cisco Small Business RV110W, RV130, RV130W, and RV215W Routers Remote Command Execution and Denial of Service Vulnerability

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 18.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-08-18 · updated 2026-06-17
Weakness: CWE-121

Description

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.

Affected products

Cisco Application Extension Platform: 1.0.3.55
Cisco RV110W Wireless-N VPN Firewall Firmware: all versions
Cisco Rv130 Vpn Router Firmware: all versions
Cisco Rv130W Wireless-N Multifunction Vpn Router Firmware: all versions
Cisco Rv215W Wireless-N Vpn Router Firmware: all versions

References

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