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CVE-2020-3331

54
FAUCET Score

CVE-2020-3331 describes a critical arbitrary code execution vulnerability in the web-based management interface of Cisco RV110W and RV215W Wireless-N VPN Routers. This flaw, stemming from improper input validation, allows an unauthenticated, remote attacker to execute code with root privileges by sending crafted requests. With a CVSS score of 9.8 (Critical) and an EPSS score indicating significant exploitability potential, the vulnerability poses a severe risk. While no public exploit code or active exploitation has been confirmed, it has garnered notable community discussion and media coverage, highlighting its perceived threat.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.2.2.8CPE matchmatch criteria
cpe:2.3:o:cisco:rv110w_wireless-n_vpn_firewall_firmware:*:*:*:*:*:*:*:*
< 1.3.1.7CPE matchmatch criteria
cpe:2.3:o:cisco:rv215w_wireless-n_vpn_router_firmware:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

9.8CRITICAL

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
42.67%
Probability of exploitation in next 30 days
EPSS Percentile
98.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.4267 is in the 96th percentile among its peer group of 36,897 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (1)

ciscovendor investigatingvia nvd_reference
View patch

References

tools.cisco.com / security/center/content/CiscoSecurityAdvisory/cisco-sa-code-exec-wH3BNFb
Vendor Advisory