CVE-2020-24377

CRITICALNVD 9.69.6—
EchelonGraph scoreMEDIUM confidence

Score 9.6 from GitHub Security Advisory (severity: CRITICAL) published 2022-05-24. NVD baseline CVSS 9.6; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
9.6EG
EchelonGraph verdictPlan mitigationSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1.2%CVSS: 9.6Exploit: None knownExposed services: Not assessed

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

A DNS rebinding vulnerability in the Freebox OS web interface in Freebox Server before 4.2.3.

CVSS v3
9.6
EG Score
9.6CRITICALmedium confidence
EG Risk
48
EG Risk 48/100CISA 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
Severity96% × 45%
Exploitation1% × 40%
Automatability30% × 15%
CISA SSVC: Track at low or medium mission impact; Track* or 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
1.2%
EPSS %ILE
66th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track* or 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 (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

September 16, 2020

Last Modified

November 21, 2024

Advisory Details (2)

Auto-updated Oct 2, 2026
No fix on record yet.
generic

DNS rebinding vulnerabilities in Freebox - /dev/posts/

https://www.gabriel.urdhr.fr/2020/09/23/dns-rebinding-freebox/
generic

L'actualité de la Freebox » Blog Archive » Mise à jour du Freebox Server (Révolution/mini/One/Delta/Pop) 4.2.3

https://dev.freebox.fr/blog/?p=10222

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 6× in last 7d / 28× 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. 2026-10-04 23:18 UTCEPSS rescore
  3. 2026-10-03 14:22 UTCEPSS rescore
  4. 2026-10-02 16:22 UTCEPSS rescore
  5. 2026-09-30 15:15 UTCEG score recompute
  6. 2026-09-30 14:59 UTCEPSS rescore
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  1. 2026-09-08 21:56 UTCEPSS rescore
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  25. 2026-08-08 16:33 UTCEPSS rescore
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  27. 2026-08-06 13:43 UTCEPSS rescore
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  41. 2026-07-23 14:15 UTCEPSS rescore
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  43. 2026-07-23 01:51 UTCEG score recompute
  44. 2026-07-22 22:37 UTCEG score recompute
  45. 2026-07-22 14:05 UTCEPSS rescore
  46. 2026-07-21 15:22 UTCEPSS rescore
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  48. 2026-07-20 17:04 UTCEPSS rescore
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  50. 2026-07-19 14:28 UTCEPSS rescore
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  73. 2026-07-01 15:03 UTCEPSS rescore
  74. 2026-06-30 23:20 UTCEPSS rescore
  75. 2026-06-30 23:20 UTCEPSS rescore

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Frequently asked(5)

What is CVE-2020-24377?
CVE-2020-24377 is a critical vulnerability published on September 16, 2020. A DNS rebinding vulnerability in the Freebox OS web interface in Freebox Server before 4.2.3.
When was CVE-2020-24377 disclosed?
CVE-2020-24377 was first published on September 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-2020-24377 actively exploited?
CVE-2020-24377 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1.2% probability of exploitation in the next 30 days (66th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2020-24377?
CVE-2020-24377 has a CVSS v3 base score of 9.6 (NVD).
How do I remediate CVE-2020-24377?
No fix for CVE-2020-24377 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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