CVE-2020-15471

CRITICALNVD 9.19.1—
EchelonGraph scoreMEDIUM confidence

Score 9.1 from GitHub Security Advisory published 2022-05-24. NVD baseline CVSS 9.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
9.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 9.1Exploit: None knownExposed: 0

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

In nDPI through 3.2, the packet parsing code is vulnerable to a heap-based buffer over-read in ndpi_parse_packet_line_info in lib/ndpi_main.c.

CVSS v3
9.1
EG Score
9.1(medium)
EG Risk
46(Track)
EG Risk 46/100SSVC: 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
Severity91% × 45%
Exploitation1% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
68%
KEV
Not listed

Published

July 1, 2020

Last Modified

January 26, 2026

Advisory Details (2)

Auto-updated Aug 1, 2026
Patch available. Sources: github_commit.
github_commit Patch Available

commit 61066fb106ef (ntop/nDPI)

Patch available: ntop/nDPI 3.4 (contains commit 61066fb106ef)

https://github.com/ntop/nDPI/commit/61066fb106efa6d3d95b67e47b662de208b2b622
generic

CVE-PoCs/ndpi-CVE-2020-15471 at main · fuzzing2026/CVE-PoCs · GitHub

https://github.com/fuzzing2026/CVE-PoCs/tree/main/ndpi-CVE-2020-15471

Affected Packages

(3 across 3 ecosystems)
Debian:12(1)
PackageVulnerable rangeFixed inDependents
ndpi—3.4-1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
ndpi—3.4-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
ndpi—3.4-1—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 8× in last 7d / 33× 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 130 total refreshes for this CVE.

  1. 2026-08-20 22:52 UTCEPSS rescore
  2. 2026-08-20 17:31 UTCOSV refresh
  3. 2026-08-19 17:00 UTCEPSS rescore
  4. 2026-08-18 13:44 UTCEPSS rescore
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  15. 2026-08-05 19:14 UTCEPSS rescore
  16. 2026-08-05 11:11 UTCOSV refresh
  17. 2026-08-04 15:06 UTCEPSS rescore
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  1. 2026-07-26 14:51 UTCEPSS rescore
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  5. 2026-07-23 14:15 UTCEPSS rescore
  6. 2026-07-23 14:15 UTCEPSS rescore
  7. 2026-07-23 01:50 UTCEG score recompute
  8. 2026-07-22 22:35 UTCEG score recompute
  9. 2026-07-22 14:05 UTCEPSS rescore
  10. 2026-07-21 15:22 UTCEPSS rescore
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  12. 2026-07-20 17:04 UTCEPSS rescore
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  14. 2026-07-19 14:28 UTCEPSS rescore
  15. 2026-07-19 09:52 UTCOSV refresh
  16. 2026-07-19 02:26 UTCEPSS rescore
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  22. 2026-07-13 22:27 UTCEPSS rescore
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  24. 2026-07-13 06:10 UTCEPSS rescore
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  26. 2026-07-12 05:44 UTCEPSS rescore
  27. 2026-07-11 08:25 UTCEPSS rescore
  28. 2026-07-11 08:25 UTCEPSS rescore
  29. 2026-07-09 19:07 UTCEPSS rescore
  30. 2026-07-08 15:12 UTCEPSS rescore
  31. 2026-07-07 13:43 UTCEPSS rescore
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  40. 2026-07-01 16:01 UTCOSV refresh
  41. 2026-07-01 15:03 UTCEPSS rescore
  42. 2026-06-30 23:20 UTCEPSS rescore
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  44. 2026-06-29 14:04 UTCEPSS rescore
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  48. 2026-06-27 03:06 UTCEPSS rescore
  49. 2026-06-25 13:47 UTCEPSS rescore
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  51. 2026-06-24 14:03 UTCEPSS rescore
  52. 2026-06-23 21:31 UTCEPSS rescore
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  64. 2026-06-16 17:50 UTCEPSS rescore
  65. 2026-06-15 17:46 UTCEPSS rescore
  66. 2026-06-14 23:15 UTCEPSS rescore
  67. 2026-06-14 00:13 UTCOSV refresh
  68. 2026-06-13 22:58 UTCEPSS rescore
  69. 2026-06-13 22:58 UTCEPSS rescore
  70. 2026-06-12 23:10 UTCEPSS rescore
  71. 2026-06-11 13:58 UTCEPSS rescore
  72. 2026-06-10 22:16 UTCEPSS rescore
  73. 2026-06-10 22:16 UTCEPSS rescore
  74. 2026-06-10 13:20 UTCEPSS rescore
  75. 2026-06-08 14:15 UTCEPSS rescore

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2020-15471?
CVE-2020-15471 is a critical vulnerability published on July 1, 2020. In nDPI through 3.2, the packet parsing code is vulnerable to a heap-based buffer over-read in ndpiparsepacketlineinfo in lib/ndpi_main.c.
When was CVE-2020-15471 disclosed?
CVE-2020-15471 was first published in the National Vulnerability Database on July 1, 2020, with the most recent update on January 26, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2020-15471 actively exploited?
CVE-2020-15471 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 32.1% of all scored CVEs.
What is the CVSS score of CVE-2020-15471?
CVE-2020-15471 has a CVSS v3 base score of 9.1 (NVD).
How do I remediate CVE-2020-15471?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2020-15471, 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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