CVE-2020-3330: Cisco Small Business RV110W Wireless-N VPN Firewall Static Default Credential Vulnerability

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 3.4% 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-798

Description

A vulnerability in the Telnet service of Cisco Small Business RV110W Wireless-N VPN Firewall Routers could allow an unauthenticated, remote attacker to take full control of the device with a high-privileged account. The vulnerability exists because a system account has a default and static password. An attacker could exploit this vulnerability by using this default account to connect to the affected system. A successful exploit could allow the attacker to gain full control of an affected device.

Affected products

Cisco RV110W Wireless-N VPN Firewall Firmware: before 1.2.2.8 — fixed in 1.2.2.8

How to fix

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

References

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