CVE-2020-3331: Cisco RV110W and RV215W Series Routers Arbitrary Code Execution Vulnerability

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 41.7% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2020-07-16 · updated 2026-06-17
Weakness: CWE-119

Description

A vulnerability in the web-based management interface of Cisco RV110W Wireless-N VPN Firewall and Cisco RV215W Wireless-N VPN Router could allow an unauthenticated, remote attacker to execute arbitrary code on an affected device. The vulnerability is due to improper validation of user-supplied input data by the web-based management interface. An attacker could exploit this vulnerability by sending crafted requests to a targeted device. A successful exploit could allow the attacker to execute arbitrary code with the privileges of the root user.

Affected products

Cisco RV110W Wireless-N VPN Firewall Firmware: before 1.2.2.8 — fixed in 1.2.2.8
Cisco Rv215W Wireless-N Vpn Router Firmware: before 1.3.1.7 — fixed in 1.3.1.7

How to fix

Upgrade to a fixed version: Cisco RV110W Wireless-N VPN Firewall Firmware 1.2.2.8; Cisco Rv215W Wireless-N Vpn Router Firmware 1.3.1.7. Check the vendor advisory for mitigations.

References

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