vciy

CVE-2023-24940

INDEX BUILT · 2026-09-20

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Windows Pragmatic General Multicast (PGM) Denial of Service Vulnerability

CVE-2023-249404 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 0.05166  ·  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 2026-05-17  ·  without this subject the record ranks 28

How much of the world it touches

NVD CPE configurations

10 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$158,000over the next 30 days, if this record is yours
Movement+$253,000on 2026-05-17, the last material move, 29 days before this reading
Basisassumeda published average, not your estate

$158,000 = $4.99M incident cost x 0.6121449559255632 exposure x 0.05166 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

0.05166EPSSNOT IN KEVas of 2026-09-20
Severity7.5 HIGHreceipt
Harmunauthenticated · networkreceipt
Exploitationnone in held sources
Defensefix version namedreceipt
Movementthreshold crossedreceipt
RISING10Risen from 0.00046 to 0.05166 across 34 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

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Harm, if it fires from the vector and the weakness

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Reachnetwork-reachable · no privileges required · no user interaction · low attack complexityreceipt
ImpactComplete availability lossreceipt
Scored fromCVSS v3.1 · the CNA's vectorreceipt
Weakness classCWE-476 NULL Pointer Dereferencereceipt
Published consequencesCWE-476: Availability: DoS: Crash, Exit, or Restart; Integrity, Confidentiality: Execute Unauthorized Code or Commands, Read Memory, Modify Memory[email protected]

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.

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 probability0.05166 · top 8% of all CVEsreceipt
Blast breadth2 products across 1 vendorderived
Assigned bymicrosoftreceipt
Recorded changes34 · last 19 Sep 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 10 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 2008 r2
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.

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Attack path

Unauthenticated network requestno credentials, no interactionMicrosoft Windows Server 2019CWE-476 NULL pointer dereferenceAvailability lossA:Hexploits CWE-476data compromise

What it is stated by the CNA

Windows Pragmatic General Multicast (PGM) Denial of Service Vulnerability receipt

NVD's analysis a second authority

weakness
CWE-476
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 7 more, listed in full below
also scored by
[email protected] 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

2025-03-17EPSS moved 0.00 to 0.192026-06-15EPSS moved 0.16 to 0.05

Movement the material steps

10 May 20230.00046
17 Mar 20250.19271 · crossed 0.10 · scoring model v2025.03.14
29 Mar 20250.29433
15 Apr 20250.03647 · crossed 0.10
18 Nov 20250.21638 · crossed 0.10
21 Nov 20250.03647 · crossed 0.10
17 May 20260.14278 · crossed 0.10
15 Jun 20260.05166 · crossed 0.10 · scoring model v2026.06.15

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

Show all 34 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
29 May 20240.00403
22 Sep 20240.00572
19 Oct 20240.00632
1 Nov 20240.00456
29 Nov 20240.00468
17 Dec 20240.00222
17 Mar 20250.19271
19 Mar 20250.21638
29 Mar 20250.29433
30 Mar 20250.21638
15 Apr 20250.03647
18 Nov 20250.21638
21 Nov 20250.03647
1 Feb 20260.03826
5 Mar 20260.04069
12 May 20260.05149
13 May 20260.05393
16 May 20260.05993
17 May 20260.14278
19 May 20260.16187
15 Jun 20260.05166

34 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 0.05166Published2023-05-09Index as of2026-06-15

Exploit probability more than doubled between 2026-05-16 and 2026-05-17 (0.05993 → 0.14278) 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 2026-06-15 derived

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