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No exploitation reportedFix available

CVE-2020-3331

No exploitation reported by the sources we read.

  • Published2020-07-16
  • Fixed in1.2.2.8
  • WeaknessCWE-119

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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.

Timeline

dates in UTC
  1. 2020-07-1618:15CVE publishedNVD
  2. 2026-10-2319:23EPSS crossed 10 %FIRST EPSS

Observed activity

isMalicious corpus · updated 2026-10-23 18:48 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2020-3331?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2020-3331?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD
Cisco rv110w wireless-n vpn firewall firmwareversion to verify
BranchAffectedFixed in
1.2< 1.2.2.81.2.2.8
Cisco rv215w wireless-n vpn router firmwareversion to verify
BranchAffectedFixed in
1.3< 1.3.1.71.3.1.7

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

  1. Update Cisco rv110w wireless-n vpn firewall firmware to 1.2.2.8

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
none listed
PoC-in-GitHub

Sources

  • CISA-ADPSSVC decisionnone2024-11-15
  • OpenCVESSVC decisionnone—
  • NVDCVSS 3.19.8read 2026-10-23
  • CNACVSS 3.09.8read 2026-10-23
  • NVDCVSS 2.010read 2026-10-23
  • CNAweakness (CWE)CWE-119read 2026-10-23
  • NVDweakness (CWE)CWE-119read 2026-10-23
  • FIRST EPSSEPSS score41.7 %read 2026-10-23

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
2020-07-16
Last Modified
2026-06-17
NVD status
Modified

Frequently asked questions

What is CVE-2020-3331?

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.

Is CVE-2020-3331 actively exploited?

Active exploitation of CVE-2020-3331 has not been confirmed. Its EPSS score was 41.7% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2020-3331?

CVE-2020-3331 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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