What is CVE-2020-3330?

CVE-2020-3330 is a critical-severity vulnerability in Cisco Rv110w Wireless-N Vpn Firewall Firmware, classified under Use of Hard-coded Credentials. CVSS score: 9.8/10. Published 2020-07-16.

How severe is CVE-2020-3330?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Vulnerability in Cisco Rv110w Wireless-N Vpn Firewall Firmware

CVE-2020-3330

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.

Published 2020-07-16 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.034 (88.9th percentile), scored 2026-10-24.

Low probability of exploitation in the next 30 days, but still tracked. 89th percentile — 88.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.034 · newest: 0.034 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-798 — Use of Hard-coded Credentials

References

tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-rv110w-s… (vendor-advisory, Vendor Advisory)

Frequently asked questions

What is CVE-2020-3330?: CVE-2020-3330 is a critical-severity vulnerability in Cisco Rv110w Wireless-N Vpn Firewall Firmware, classified under Use of Hard-coded Credentials. CVSS score: 9.8/10. Published 2020-07-16.
How severe is CVE-2020-3330?: Critical severity. CVSS v3 base score is 9.8 out of 10.