CVE-2021-1609: Cisco Small Business RV Series Router Firmware

Critical severity, CVSS 9.8. EPSS: 9.7% chance of exploitation in the next 30 days.

Multiple vulnerabilities in the web-based management interface of the Cisco Small Business RV340, RV340W, RV345, and RV345P Dual WAN Gigabit VPN Routers could allow an attacker to do the following: Execute arbitrary code Cause a denial of service (DoS) condition Execute arbitrary commands For more information about these vulnerabilities, see the Details section of this advisory.

Affected products

• Cisco Small Business RV Series Router Firmware: before 1.0.03.22 (fixed in 1.0.03.22)

Published 2021-08-04. Last modified 2026-06-17.