vciy

CVE-2020-14303

INDEX BUILT · 2026-09-20

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A flaw was found in the AD DC NBT server in all Samba versions before 4.10.17, before 4.11.11 and before 4.12.4

CVE-2020-143034 of 4 sources documented this
29

rank 29 = 1 + 19 + 1 + 8 + 0

rank@v1 · scheduled

Someone is already using it

CISA KEV catalog · public proof-of-concept · FIRST EPSS

EPSS 0.03539  ·  without this subject the record ranks 28

What it costs you if it fires

NVD CVSS base score, then the CNA's own

CVSS 7.5, from NVD  ·  without this subject the record ranks 10

It is getting worse, not staying still

FIRST EPSS series, rescorings and bad loads removed

rose on 2025-10-28  ·  without this subject the record ranks 28

How much of the world it touches

NVD CPE configurations

12 products in the CPE ranges  ·  without this subject the record ranks 21

Someone else already set the date

CISA KEV remediation due date

no CISA due date  ·  without this subject the record ranks 29

Unaudited dollar value2 of 3 inputs carry a receipt
Exposure$108,000over the next 30 days, if this record is yours
Movement-$451,000on 2022-04-01, the last material move, 4 years, 2 months before this reading
Basisassumeda published average, not your estate

$108,000 = $4.99M incident cost x 0.6121449559255632 exposure x 0.03539 likelihood

udv@v1 · unaudited · wrong for you until you say what you run

$4.99M is the cost of a breach that happened, from IBM Cost of a Data Breach Report 2026, global average. It is not the value of any asset of yours. That average already covers breaches of every severity, so scaling it by exposure understates a partial-impact record. That is an assumption, not a measurement. Your own asset value goes in the decision record.

Hindsight · the state

0.03539EPSSNOT IN KEVas of 2026-09-20
Severity7.5 HIGHreceipt
Harmunauthenticated · networkreceipt
Exploitationnone in held sources
Defenseunaffected versions publishedreceipt
Movementthreshold crossedreceipt
RISING10Risen from 0.02476 to 0.03539 across 31 observations. arc-rules@v1

Foresight · where to check next

No weakness class or product neighbourhood is held for this record, so this index cannot name anywhere to check next. That is an absence in the record, not a finding about the software.

Color is a claim, not decoration:the hostile worldthe defenseno signal

Running Samba? Check your version

A deterministic range check against the ranges this record publishes. It tells you where a version sits in the record, not whether your deployment is exploitable. No account needed.

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Harm, if it fires from the vector and the weakness

Written for the ticket you're about to file.

Reachnetwork-reachable · no privileges required · no user interaction · low attack complexityreceipt
ImpactComplete availability lossreceipt
Scored fromCVSS v3.1 · NVD's vectorreceipt
Weakness classCWE-834 Excessive Iterationreceipt
Published consequencesCWE-834: Availability: DoS: Resource Consumption (CPU), DoS: Resource Consumption (Memory), DoS: Amplification, DoS: Crash, Exit, or Restart[email protected]

CISA KEV & Federal Remediation Deadline from the record and CISA

The fix, and how long it's been waiting.

First unaffected version, by branchsamba 4.10.17; samba 4.11.11; samba 4.12.4receipt
Patch available sinceNo dated patch-availability record in held sources. The index holds reference URLs without dates and only the current revision of the CVE record, so the day a fix first existed cannot be derived. Only the versions it landed in.

Exploit Status & Known PoCs a ladder, not a score

Current rung: Nothing observed in held sources.

  • RUNG 1Nothing observed in held sources
  • RUNG 2Proof-of-concept published
  • RUNG 3Exploited in the wild · CISA KEV listed
  • RUNG 4Ransomware campaign use known

Authority who says so

CVSS, NVD7.5 HIGHreceipt
Exploit probability0.03539 · top 11% of all CVEsreceipt
Blast breadth5 products across 5 vendorsderived
Assigned byredhatreceipt
Recorded changes31 · last 19 Sep 2026derived

Affected & Fixed Versions as published

Affected productSambareceipt
Published rangessamba >= 4.10.0 < 4.10.17; samba >= 4.11.0 < 4.11.11; samba >= 4.12.0 < 4.12.4; fedoraproject fedora 31receipt
Show all 12 published ranges
samba >= 4.10.0 < 4.10.17
samba >= 4.11.0 < 4.11.11
samba >= 4.12.0 < 4.12.4
fedoraproject fedora 31
opensuse leap 15.1
opensuse leap 15.2
debian linux 9.0
canonical ubuntu linux 12.04
canonical ubuntu linux 14.04
canonical ubuntu linux 16.04
canonical ubuntu linux 18.04
canonical ubuntu linux 20.04

A rung lights from a row in the index, never from an assessment. "Held sources" is the true scope of the claim: this index reads the CVE record, NVD, CISA KEV, FIRST's EPSS and public proof-of-concept repositories, and it does not observe attacks.

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What it is stated by the CNA

A flaw was found in the AD DC NBT server in all Samba versions before 4.10.17, before 4.11.11 and before 4.12.4. A samba user could send an empty UDP packet to cause the samba server to crash. receipt

NVD's analysis a second authority

severity
7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
weakness
CWE-834
affected versions
samba >= 4.10.0 < 4.10.17; samba >= 4.11.0 < 4.11.11; samba >= 4.12.0 < 4.12.4; and 9 more, listed in full below

check it yourself bugzilla.redhat.com samba.org security.netapp.com lists.fedoraproject.org lists.opensuse.org lists.opensuse.org +5 morereceipt

Dated events

2022-01-06EPSS moved 0.02 to 0.102026-06-15EPSS moved 0.32 to 0.04

Movement the material steps

14 Apr 20210.02476
6 Jan 20220.10225 · crossed 0.10
1 Apr 20220.01537 · crossed 0.10
7 Mar 20230.0146 · scoring model v2023.03.01
17 Mar 20250.21782 · crossed 0.10 · scoring model v2025.03.14
10 Jun 20260.32009
15 Jun 20260.03539 · crossed 0.10 · scoring model v2026.06.15
Show all 31 observations
14 Apr 20210.02476
6 Jan 20220.10225
4 Feb 20220.16306
1 Apr 20220.01537
7 Mar 20230.0146
8 Mar 20230.01460
9 Mar 20230.01479
22 Mar 20230.01605
15 May 20230.02258
9 Aug 20230.03084
8 Nov 20230.01518
10 May 20240.01474
27 May 20240.01416
12 Jun 20240.01613
30 Oct 20240.01136
17 Dec 20240.00647
17 Mar 20250.21782
19 Mar 20250.1872
29 Mar 20250.19612
30 Mar 20250.1872
30 Jul 20250.16342
1 Oct 20250.26119
27 Oct 20250.16342
28 Oct 20250.26119
18 Nov 20250.26509
21 Nov 20250.26119
27 Dec 20250.16342
28 Dec 20250.26119
10 Mar 20260.26364
10 Jun 20260.32009
15 Jun 20260.03539

31 observations held. A highlighted step crossed a promotion threshold. A step marked with a scoring model moved because the instrument was replaced, not because the vulnerability changed. receipt

The full biography

EPSS 0.03539Published2020-07-06Index as of2026-06-15

The record had been public for 5 years, 11 months when this index was last written.

Published 2020-07-06 receipt · Index as of 2026-06-15 derived

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