CVE-2020-3331

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.8 under NVD CVSS v3. EPSS exploit probability: 42% (98th percentile of EPSS-scored CVEs). GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
Elevated
9.8EG
EchelonGraph verdictPlan mitigationSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 42%CVSS: 9.8Exploit: Elevated riskExposed services: Not assessed

No fix is confirmed yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for the fix.

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.

CVSS v3
9.8
EG Score
9.8CRITICALmedium confidence
EG Risk
76
EG Risk 76/100CISA SSVC

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity98% × 45%
Exploitation42% × 40%
Automatability100% × 15%
CISA SSVC: Track at low or medium mission impact; Attend at high (mission-essential systems).
Action: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high, and watch the vendor's advisory for the fix.
EPSS PROB
42%
EPSS %ILE
98th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Attend at high (mission-essential systems).

No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high, and watch the vendor's advisory for the fix.

Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

July 16, 2020

Last Modified

November 21, 2024

Advisory Details (1)

Auto-updated Oct 4, 2026
No fix on record yet.
generic

Cisco RV110W and RV215W Series Routers Arbitrary Code Execution Vulnerability

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-code-exec-wH3BNFb

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 3× in last 7d / 16× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 129 total refreshes for this CVE.

  1. 2026-10-03 14:22 UTCEPSS rescore
  2. 2026-09-30 15:18 UTCEG score recompute
  3. 2026-09-30 14:59 UTCEPSS rescore
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  1. 2026-08-25 13:45 UTCEPSS rescore
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  22. 2026-07-23 14:15 UTCEPSS rescore
  23. 2026-07-23 14:15 UTCEPSS rescore
  24. 2026-07-23 01:52 UTCEG score recompute
  25. 2026-07-22 22:39 UTCEG score recompute
  26. 2026-07-22 14:05 UTCEPSS rescore
  27. 2026-07-21 15:22 UTCEPSS rescore
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  29. 2026-07-20 17:04 UTCEPSS rescore
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  31. 2026-07-19 14:28 UTCEPSS rescore
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  46. 2026-07-09 19:07 UTCEPSS rescore
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  48. 2026-07-07 13:43 UTCEPSS rescore
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  73. 2026-06-16 17:50 UTCEPSS rescore
  74. 2026-06-15 17:46 UTCEPSS rescore
  75. 2026-06-14 23:15 UTCEPSS rescore

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Frequently asked(5)

What is CVE-2020-3331?
CVE-2020-3331 is a critical vulnerability published on July 16, 2020. 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…
When was CVE-2020-3331 disclosed?
CVE-2020-3331 was first published on July 16, 2020, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2020-3331 actively exploited?
CVE-2020-3331 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 42% probability of exploitation in the next 30 days (98th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2020-3331?
CVE-2020-3331 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2020-3331?
No fix for CVE-2020-3331 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix.

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