vciy

CVE-2023-24939

INDEX BUILT · 2026-10-18

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Server for NFS Denial of Service Vulnerability

CVE-2023-249394 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 0.04656  ·  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 the CNA  ·  without this subject the record ranks 10

It is getting worse, not staying still

FIRST EPSS series, rescorings and bad loads removed

rose on 2026-05-19  ·  without this subject the record ranks 28

How much of the world it touches

NVD CPE configurations

9 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

Hindsight · the state

0.04656EPSSNOT IN KEVas of 2026-10-18
Severity7.5 HIGHreceipt
Harmunauthenticated · networkreceipt
Exploitationnone in held sources
Defensefix version namedreceipt
Movementdoubled within 72hreceipt
PLATEAU10Minimal movement since 2025-11-21, 213 days at 0.05, as of 2026-06-22. 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

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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 · the CNA's vectorreceipt
Weakness classNo CWE mapping in held sources.

CISA KEV & Federal Remediation Deadline from the record and CISA

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

Fixed in10.0.17763.4377; 10.0.20348.1726; 10.0.19042.2965; 10.0.22000.1936; 10.0.19044.2965; 10.0.22621.1702; 10.0.19045.2965; 10.0.10240.19926; 10.0.14393.5921…receipt
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.
BOD 26-04 deadlineIf the system is reachable from the internet: 14 days. If not: fix at the next system upgrade.derived
Show full BOD 26-04 deadline

CISA has not scored it, so the directive's own defaults apply: automatable no, technical impact total. Calendar days from the KEV listing or from when you find it on a system, whichever is first. Federal agencies are bound from 7 Dec 2026, and contracts often carry it to suppliers. The directive and its table

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, the CNA7.5 HIGHreceipt
Exploit probability0.04656 · top 8% of all CVEsreceipt
Blast breadth2 products across 1 vendorderived
Assigned bymicrosoftreceipt
Recorded changes37 · last 18 Oct 2026derived

Affected & Fixed Versions as published

Affected productMicrosoft Windows 10 Version 1809; Microsoft Windows Server 2019; Microsoft Windows Server 2019 (Server Core installation); Microsoft Windows Server 2022; Microsoft Windows 10 Version 20H2…receipt
Published rangesmicrosoft windows 10 1507 < 10.0.10240.19926; microsoft windows 10 1607 < 10.0.14393.5921; microsoft windows 10 1809 < 10.0.17763.4377; microsoft windows 10 20h2 < 10.0.19042.2965receipt
Show all 9 published ranges
microsoft windows 10 1507 < 10.0.10240.19926
microsoft windows 10 1607 < 10.0.14393.5921
microsoft windows 10 1809 < 10.0.17763.4377
microsoft windows 10 20h2 < 10.0.19042.2965
microsoft windows 10 21h2 < 10.0.19044.2965
microsoft windows 10 22h2 < 10.0.19045.2965
microsoft windows 11 21h2 < 10.0.22000.1936
microsoft windows 11 22h2 < 10.0.22000.1702
microsoft windows server 2012 r2
Fixed in10.0.17763.4377; 10.0.20348.1726; 10.0.19042.2965; 10.0.22000.1936; 10.0.19044.2965; 10.0.22621.1702; 10.0.19045.2965; 10.0.10240.19926; 10.0.14393.5921…receipt

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.

Unaudited dollar value2 of 3 inputs carry a receipt
Exposure$142,000over the next 30 days, if this record is yours
Movement+$230,000on 2026-05-19, the last material move, 1 month before this reading
Basisassumeda published average, not your estate

$142,000 = $4.99M incident cost x 0.6121449559255632 exposure x 0.04656 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.

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What it is stated by the CNA

Server for NFS Denial of Service Vulnerability receipt

NVD's analysis a second authority

affected versions
microsoft windows 10 1507 < 10.0.10240.19926; microsoft windows 10 1607 < 10.0.14393.5921; microsoft windows 10 1809 < 10.0.17763.4377; and 6 more, listed in full below
also scored by
secure@microsoft.com 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

check it yourself msrc.microsoft.com receipt

Dated events

2025-03-19EPSS moved 0.05 to 0.122025-04-15EPSS moved 0.20 to 0.032026-06-15EPSS moved 0.13 to 0.05

Movement the material steps

10 May 20230.00046
17 Mar 20250.0483 · scoring model v2025.03.14
19 Mar 20250.12163 · crossed 0.10
29 Mar 20250.34372
30 Mar 20250.19617
15 Apr 20250.03278 · crossed 0.10
18 Nov 20250.19617 · crossed 0.10
21 Nov 20250.04141 · crossed 0.10
19 May 20260.12836 · crossed 0.10
15 Jun 20260.05418 · crossed 0.10 · scoring model v2026.06.15
22 Jun 20260.04656

This score more than doubled inside 72 hours. Both observations are in the full history below.

Show all 37 observations
10 May 20230.00046
16 May 20230.00069
8 Jul 20230.00065
14 Jul 20230.00116
22 Jul 20230.00165
18 Sep 20230.00179
26 Sep 20230.00168
12 Oct 20230.00179
30 Oct 20230.00126
3 Dec 20230.00090
10 Feb 20240.00065
4 Mar 20240.00063
15 May 20240.00109
22 Sep 20240.00155
19 Oct 20240.00172
1 Nov 20240.00124
29 Nov 20240.00127
17 Dec 20240.00060
17 Mar 20250.0483
19 Mar 20250.12163
25 Mar 20250.19617
29 Mar 20250.34372
30 Mar 20250.19617
15 Apr 20250.03278
25 Jun 20250.04141
18 Nov 20250.19617
21 Nov 20250.04141
18 Dec 20250.03518
1 Feb 20260.03691
5 Mar 20260.03925
10 May 20260.03602
12 May 20260.04566
13 May 20260.04783
16 May 20260.05321
19 May 20260.12836
15 Jun 20260.05418
22 Jun 20260.04656

37 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 0.04656Published2023-05-09Index as of2026-06-22

Exploit probability more than doubled between 2025-03-17 and 2025-03-19 (0.0483 → 0.12163) and the record had been public for 3 years, 1 month when this index was last written.

Published 2023-05-09 receipt · Index as of 2026-06-22 derived

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