CVE-2020-3337

MEDIUMNVD 6.16.1—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.1 under NVD CVSS v3. EPSS exploit probability: 0.8%, top 47% of all CVEs by exploit prediction. 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
6.1
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 1%CVSS: 6.1Exploit: NoneExposed: 0

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

A vulnerability in the web server of Cisco Umbrella could allow an unauthenticated, remote attacker to redirect a user to an undesired web page. The vulnerability is due to improper input validation of the URL parameters in an HTTP request that is sent to an affected device. An attacker could exploit this vulnerability by sending a crafted HTTP request that could cause the web application to redirect the request to a specified malicious URL. A successful exploit could allow the attacker to redirect a user to a malicious website.

CVSS v3
6.1
EG Score
6.1(medium)
EG Risk
28(Track)
EG Risk 28/100SSVC: Track

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
Severity61% × 45%
Exploitation1% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
53.2%
KEV
Not listed

Published

June 18, 2020

Last Modified

November 21, 2024

References (2)

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 12× in last 7d / 43× 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.

  1. 2026-07-23 01:52 UTCEG score recompute
  2. 2026-07-22 22:39 UTCEG score recompute
  3. 2026-07-22 14:05 UTCEPSS rescore
  4. 2026-07-21 15:22 UTCEPSS rescore
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  1. 2026-07-06 16:25 UTCEPSS rescore
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  23. 2026-06-21 01:57 UTCEPSS rescore
  24. 2026-06-19 19:24 UTCEPSS rescore
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  26. 2026-06-18 17:50 UTCEPSS rescore
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  30. 2026-06-15 17:46 UTCEPSS rescore
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  45. 2026-06-05 06:08 UTCEPSS rescore
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  49. 2026-06-02 20:11 UTCEPSS rescore
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  52. 2026-05-31 22:29 UTCEPSS rescore
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  56. 2026-05-29 13:42 UTCEPSS rescore
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  59. 2026-05-27 13:39 UTCEPSS rescore
  60. 2026-05-27 13:39 UTCEPSS rescore
  61. 2026-05-27 02:20 UTCEG score recompute
  62. 2026-05-27 02:20 UTCGHSA enrichment
  63. 2026-05-26 13:42 UTCEPSS rescore
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  65. 2026-05-26 07:17 UTCEPSS rescore
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Frequently asked(5)

What is CVE-2020-3337?
CVE-2020-3337 is a medium vulnerability published on June 18, 2020. A vulnerability in the web server of Cisco Umbrella could allow an unauthenticated, remote attacker to redirect a user to an undesired web page. The vulnerability is due to improper input validation of the URL parameters in an HTTP request that is sent to an affected device. An attacker could…
When was CVE-2020-3337 disclosed?
CVE-2020-3337 was first published in the National Vulnerability Database on June 18, 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-2020-3337 actively exploited?
CVE-2020-3337 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 53.2% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2020-3337?
CVE-2020-3337 has a CVSS v3 base score of 6.1 (NVD).
How do I remediate CVE-2020-3337?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2020-3337, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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