vciy

CVE-2024-49121

INDEX BUILT · 2026-09-20

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Windows Lightweight Directory Access Protocol (LDAP) Denial of Service Vulnerability

CVE-2024-491214 of 4 sources documented this
30

rank 30 = 1 + 19 + 1 + 9 + 0

rank@v1 · scheduled

Someone is already using it

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

EPSS 0.02355  ·  without this subject the record ranks 29

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 11

It is getting worse, not staying still

FIRST EPSS series, rescorings and bad loads removed

rose on 2026-01-09  ·  without this subject the record ranks 29

How much of the world it touches

NVD CPE configurations

15 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 30

Unaudited dollar value2 of 3 inputs carry a receipt
Exposure$71,900over the next 30 days, if this record is yours
Movement+$80,900on 2025-09-05, the last material move, 1 year before this reading
Basisassumeda published average, not your estate

$71,900 = $4.99M incident cost x 0.6121449559255632 exposure x 0.02355 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

0.02355EPSSNOT IN KEVas of 2026-09-20
Severity7.5 HIGHreceipt
Harmunauthenticated · networkreceipt
Exploitationnone in held sources
Defensefix version namedreceipt
Movementdoubled within 72hreceipt
PLATEAU10Minimal movement since 2026-06-15, 93 days at 0.02, as of 2026-09-16. 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 Microsoft Windows 10 Version 1507? 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 · 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 in10.0.10240.20857; 10.0.14393.7606; 10.0.17763.6659; 10.0.19044.5247; 10.0.19045.5247; 10.0.22621.4602; 10.0.22631.4602; 10.0.26100.2605; 6.0.6003.23016…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 probability0.02355 · top 17% of all CVEsreceipt
Blast breadth2 products across 1 vendorderived
Assigned bymicrosoftreceipt
Recorded changes30 · last 19 Sep 2026derived

Affected & Fixed Versions as published

Affected productMicrosoft Windows 10 Version 1507; Microsoft Windows 10 Version 1607; Microsoft Windows 10 Version 1809; Microsoft Windows 10 Version 21H2; Microsoft Windows 10 Version 22H2…receipt
Published rangesmicrosoft windows 10 1507 < 10.0.10240.20857; microsoft windows 10 1607 < 10.0.14393.7606; microsoft windows 10 1809 < 10.0.17763.6659; microsoft windows 10 21h2 < 10.0.19044.5247receipt
Show all 15 published ranges
microsoft windows 10 1507 < 10.0.10240.20857
microsoft windows 10 1607 < 10.0.14393.7606
microsoft windows 10 1809 < 10.0.17763.6659
microsoft windows 10 21h2 < 10.0.19044.5247
microsoft windows 10 22h2 < 10.0.19045.5247
microsoft windows 11 22h2 < 10.0.22621.4602
microsoft windows 11 23h2 < 10.0.22631.4602
microsoft windows 11 24h2 < 10.0.26100.2605
microsoft windows server 2008 r2
microsoft windows server 2012 r2
microsoft windows server 2016 < 10.0.14393.7606
microsoft windows server 2019 < 10.0.17763.6659
microsoft windows server 2022 < 10.0.20348.2966
microsoft windows server 2022 23h2 < 10.0.25398.1308
microsoft windows server 2025 < 10.0.26100.2605
Fixed in10.0.10240.20857; 10.0.14393.7606; 10.0.17763.6659; 10.0.19044.5247; 10.0.19045.5247; 10.0.22621.4602; 10.0.22631.4602; 10.0.26100.2605; 6.0.6003.23016…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 2012CWE-476 NULL pointer dereferenceAvailability lossA:Hexploits CWE-476data compromise

What it is stated by the CNA

Windows Lightweight Directory Access Protocol (LDAP) Denial of Service Vulnerability receipt

NVD's analysis a second authority

weakness
CWE-476
affected versions
microsoft windows 10 1507 < 10.0.10240.20857; microsoft windows 10 1607 < 10.0.14393.7606; microsoft windows 10 1809 < 10.0.17763.6659; and 12 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

2025-09-05EPSS moved 0.08 to 0.112026-01-18EPSS moved 0.24 to 0.132026-06-15EPSS moved 0.17 to 0.02

Movement the material steps

11 Dec 20240.00043
17 Mar 20250.00312 · scoring model v2025.03.14
5 Sep 20250.10566 · crossed 0.10
9 Jan 20260.23781
18 Jan 20260.131
15 Jun 20260.02277 · crossed 0.10 · scoring model v2026.06.15
16 Sep 20260.02355

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

Show all 30 observations
11 Dec 20240.00043
17 Dec 20240.00046
15 Jan 20250.00275
17 Mar 20250.00312
19 Mar 20250.01152
25 Mar 20250.03466
29 Mar 20250.02848
30 Mar 20250.03466
11 Apr 20250.03978
8 May 20250.02975
9 May 20250.03298
20 May 20250.04483
6 Jul 20250.04793
15 Aug 20250.05193
26 Aug 20250.07918
5 Sep 20250.10566
26 Sep 20250.11326
6 Oct 20250.12984
18 Nov 20250.1664
21 Nov 20250.12984
4 Dec 20250.16667
16 Dec 20250.18964
9 Jan 20260.23781
18 Jan 20260.131
25 Jan 20260.16487
2 Feb 20260.16507
1 May 20260.16619
15 Jun 20260.02277
5 Jul 20260.02322
16 Sep 20260.02355

30 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 0.02355Published2024-12-10Index as of2026-09-16

Exploit probability more than doubled between 2025-03-17 and 2025-03-19 (0.00312 → 0.01152) and the record had been public for 1 year, 9 months when this index was last written.

Published 2024-12-10 receipt · Index as of 2026-09-16 derived

Siblings and hubs

Records related to this one

Its defect family

microsoft windows 10 version 1507

Of the 9 records in this family, this is the only one holding a stated fix version: 10.0.10240.20857; 10.0.14393.7606; 10.0.17763.6659; 10.0.190.

Grouped by shared product and weakness, not by shared vulnerability. Each record's own state is on its own page.

Family membership: held values

This record is one of a group, and the group's page describes all of them. This page is kept and dated, and the defect family's own page is the one we offer for indexing: the whole group.

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What usually comes next

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