How severe is CVE-2020-3330?

CVE-2020-3330 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2020-3330 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (88th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-3330?

CVE-2020-3330 affects Cisco Rv110w Wireless-n Vpn Firewall Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-3330?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2020-3330 published?

CVE-2020-3330 was published on 2020-07-16 and last updated on 2026-06-17.

CVE-2020-3330

CVE-2020-3330 is a critical-severity vulnerability in Cisco Rv110w Wireless-n Vpn Firewall Firmware with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-798.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 10.0
EPSS exploit prediction: 3% (88th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-798
Affected product: Cisco Rv110w Wireless-n Vpn Firewall Firmware
Published: 2020-07-16
Last modified: 2026-06-17

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.

Frequently asked questions

What is 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.
How severe is CVE-2020-3330?: CVE-2020-3330 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2020-3330 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (88th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-3330?: CVE-2020-3330 affects Cisco Rv110w Wireless-n Vpn Firewall Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-3330?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2020-3330 published?: CVE-2020-3330 was published on 2020-07-16 and last updated on 2026-06-17.

References

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-rv110w-static-cred-BMTWBWTy

Affected products (1)

cpe:2.3:o:cisco:rv110w_wireless-n_vpn_firewall_firmware:*:*:*:*:*:*:*:*

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