CVE-2020-20741

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.8 under NVD CVSS v3. EPSS exploit probability: 1.6% (74th 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
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1.6%CVSS: 9.8Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Incorrect Access Control in Beckhoff Automation GmbH & Co. KG CX9020 with firmware version CX9020_CB3011_WEC7_HPS_v602_TC31_B4016.6 allows remote attackers to bypass authentication via the "CE Remote Display Tool" as it does not close the incoming connection on the Windows CE side if the credentials are incorrect.

CVSS v3
9.8
EG Score
9.8CRITICALmedium confidence
EG Risk
49
EG Risk 49/100CISA 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%
Exploitation2% × 40%
Automatability30% × 15%
CISA SSVC: Track at low or medium mission impact; Track* or Attend at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
1.6%
EPSS %ILE
74th
KEV
Not listed

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

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation none (no KEV listing, exploit record or EPSS ≥ 50%) · Automatable unknown (not published for this CVE) · Technical impact total (CVSS ≥ 9.0). 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 23, 2021

Last Modified

November 21, 2024

Advisory Details (1)

Auto-updated Oct 4, 2026
Patch available.
generic
https://download.beckhoff.com/download/Document/product-security/Advisories/advisory-2019-006.pdf

Data Freshness Timeline

(refreshed 5× in last 7d / 27× 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 161 total refreshes for this CVE.

  1. 2026-10-05 17:39 UTCEPSS rescore
  2. 2026-10-03 14:22 UTCEPSS rescore
  3. 2026-10-02 16:22 UTCEPSS rescore
  4. 2026-09-30 15:14 UTCEG score recompute
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  1. 2026-09-07 15:57 UTCEPSS rescore
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  27. 2026-08-05 19:14 UTCEPSS rescore
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  41. 2026-07-23 14:15 UTCEPSS rescore
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  43. 2026-07-23 01:50 UTCEG score recompute
  44. 2026-07-22 22:36 UTCEG score recompute
  45. 2026-07-22 14:05 UTCEPSS rescore
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  48. 2026-07-20 17:04 UTCEPSS rescore
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  75. 2026-07-01 15:03 UTCEPSS rescore

Frequently asked(5)

What is CVE-2020-20741?
CVE-2020-20741 is a critical vulnerability published on July 23, 2021. Incorrect Access Control in Beckhoff Automation GmbH & Co. KG CX9020 with firmware version CX9020CB3011WEC7HPSv602TC31B4016.6 allows remote attackers to bypass authentication via the "CE Remote Display Tool" as it does not close the incoming connection on the Windows CE side if the credentials are…
When was CVE-2020-20741 disclosed?
CVE-2020-20741 was first published on July 23, 2021, 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-2020-20741 actively exploited?
CVE-2020-20741 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1.6% probability of exploitation in the next 30 days (74th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2020-20741?
CVE-2020-20741 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2020-20741?
A fix for CVE-2020-20741 is available: update to the fixed version the vendor names in its advisory.

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