vciy

CVE-2025-24983

INDEX BUILT · 2026-09-20

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Windows Win32 Kernel Subsystem Elevation of Privilege Vulnerability

CVE-2025-249834 of 4 sources documented this
70

rank 70 = 40 + 18 + 0 + 6 + 6

rank@v1 · act now

Someone is already using it

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

EPSS 0.01348 · CISA KEV listed  ·  without this subject the record ranks 30

What it costs you if it fires

NVD CVSS base score, then the CNA's own

CVSS 7.0, from the CNA  ·  without this subject the record ranks 52

It is getting worse, not staying still

FIRST EPSS series, rescorings and bad loads removed

no persisting rise in 365 days  ·  without this subject the record ranks 70

How much of the world it touches

NVD CPE configurations

5 products in the CPE ranges  ·  without this subject the record ranks 64

Someone else already set the date

CISA KEV remediation due date

CISA remediation date held  ·  without this subject the record ranks 64

Unaudited dollar value2 of 3 inputs carry a receipt
Exposure$67,300over the next 30 days, if this record is yours
Movementno material movementthe record holds only daily drift and scoring model releases
Basisassumeda published average, not your estate

$67,300 = $4.99M incident cost x 1 exposure x 0.01348 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

0.01348EPSSKEV · LISTED
Severity7 HIGHreceipt
Harmtotal lossreceipt
Exploitationin the wild · KEVreceipt
Defensefix version namedreceipt
Movementdoubled within 72hreceipt
PLATEAU10Minimal movement since 2025-03-12, 541 days at 0.01, as of 2026-09-04. arc-rules@v1

Foresight · where to check next

Microsoft WindowsMicrosoft WindowsMicrosoft WindowsMicrosoft Windows24983

This record is one instance of CWE-416, use after free. The index holds 8700 prior instances of this class, 105 KEV-listed. The nearest of its KEV-listed records are drawn beside this. taxonomy@v1

Full pattern panel

Prior records in this weakness class. Each is its own record, dated and receipted.
Color is a claim, not decoration:the hostile worldthe defenseno signalspoke length is how much of the record matches, not how bad it is

Running Microsoft Windows 10 Version 1507? Check your version

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Harm, if it fires from the vector and the weakness

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Reachneeds local access · low privileges required · no user interaction · high attack complexityreceipt
ImpactComplete confidentiality, integrity and availability lossreceipt
Scored fromCVSS v3.1 · the CNA's vectorreceipt
Weakness classCWE-416 Use After Freereceipt
Published consequencesCWE-416: Integrity: Modify Memory; Availability: DoS: Crash, Exit, or Restart; Confidentiality: Read Memory; Integrity, Confidentiality, Availability: Execute Unauthorized Code or Commands[email protected]
Ransomware campaign useUnknown to CISAreceipt

CISA KEV & Federal Remediation Deadline from the record and CISA

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

Fixed in10.0.10240.20947; 10.0.14393.7876; 6.1.7601.27618; 6.0.6003.23168; 6.2.9200.25368; 6.3.9600.22470receipt
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.
CISA remediation statusoverdue since 2025-04-01receipt
CISA required actionApply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.receipt
Published to CISA KEVsame dayderived

Exploit Status & Known PoCs a ladder, not a score

Current rung: Exploited in the wild · CISA KEV listed, 2025-03-11.

  • RUNG 1Nothing observed in held sources
  • RUNG 2Proof-of-concept published
  • RUNG 3Exploited in the wild · CISA KEV listed2025-03-11receipt
  • RUNG 4Ransomware campaign use known

Authority who says so

CVSS, the CNA7 HIGHreceipt
Exploit probability0.01348 · top 30% of all CVEsreceipt
Blast breadth2 products across 1 vendorderived
Assigned bymicrosoftreceipt
Recorded changes66 · last 19 Sep 2026derived

Affected & Fixed Versions as published

Affected productMicrosoft Windows 10 Version 1507; Microsoft Windows 10 Version 1607; Microsoft Windows Server 2008 R2 Service Pack 1; Microsoft Windows Server 2008 R2 Service Pack 1 (Server Core installation)…receipt
Published rangesmicrosoft windows 10 1507 < 10.0.10240.20947; microsoft windows 10 1607 < 10.0.14393.7876; microsoft windows server 2008 r2; microsoft windows server 2012 r2receipt
Show all 5 published ranges
microsoft windows 10 1507 < 10.0.10240.20947
microsoft windows 10 1607 < 10.0.14393.7876
microsoft windows server 2008 r2
microsoft windows server 2012 r2
microsoft windows server 2016 < 10.0.14393.7876
Fixed in10.0.10240.20947; 10.0.14393.7876; 6.1.7601.27618; 6.0.6003.23168; 6.2.9200.25368; 6.3.9600.22470receipt

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

Local accessrequires low privilegesCISA KEV listingadded 03-11 · due 04-01Microsoft Windows Server 2012CWE-416 use after freeFull compromise (C/I/A)C:H / I:H / A:Hmandates remediationexploits CWE-416data compromise

What it is stated by the CNA

Use after free in Windows Win32 Kernel Subsystem allows an authorized attacker to elevate privileges locally. receipt

NVD's analysis a second authority

weakness
CWE-416
affected versions
microsoft windows 10 1507 < 10.0.10240.20947; microsoft windows 10 1607 < 10.0.14393.7876; microsoft windows server 2008 r2; and 2 more, listed in full below
also scored by
[email protected] 7 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

check it yourself msrc.microsoft.com receipt

Dated events

2025-03-11Added to CISA KEV2025-04-01CISA remediation due

Movement the material steps

12 Mar 20250.00082
17 Mar 20250.02799 · scoring model v2025.03.14
15 Jun 20260.01267 · scoring model v2026.06.15
7 Aug 20260.01348

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

Show all 55 observations
12 Mar 20250.00082
14 Mar 20250.00072
17 Mar 20250.02799
19 Mar 20250.02417
23 Mar 20250.02121
24 Mar 20250.01803
25 Mar 20250.01551
27 Mar 20250.01157
28 Mar 20250.01551
29 Mar 20250.01157
30 Mar 20250.01551
1 Apr 20250.0191
12 Apr 20250.02193
15 Apr 20250.02621
17 Apr 20250.01686
5 May 20250.019
13 May 20250.01632
18 May 20250.01889
3 Jun 20250.01648
15 Jun 20250.01664
3 Jul 20250.01502
6 Jul 20250.01399
11 Jul 20250.01465
7 Aug 20250.01229
22 Aug 20250.0132
29 Aug 20250.00976
5 Sep 20250.0086
16 Sep 20250.00935
21 Sep 20250.0087
24 Sep 20250.00542
26 Sep 20250.00531
22 Oct 20250.008
28 Oct 20250.00609
18 Nov 20250.01712
21 Nov 20250.00609
5 Dec 20250.00686
18 Dec 20250.0065
28 Dec 20250.00683
8 Jan 20260.00663
28 Jan 20260.00665
3 Feb 20260.00683
4 Feb 20260.0065
7 Feb 20260.00683
8 Feb 20260.00655
21 Feb 20260.00668
4 Apr 20260.00493
10 Apr 20260.00567
19 Apr 20260.01542
21 Apr 20260.01471
17 May 20260.01672
28 May 20260.01727
30 May 20260.01797
15 Jun 20260.01267
15 Jul 20260.01298
7 Aug 20260.01348

55 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 0.01348Published · CISA KEV2025-03-11Index as of2026-09-04

Listed by CISA on the day it published, exploit probability more than doubled between 2025-03-14 and 2025-03-17 (0.00072 → 0.02799) and the record had been public for 1 year, 5 months when this index was last written.

No material movement in 28 days as of the last ingest this index recorded.

Published 2025-03-11 receipt · CISA KEV 2025-03-11 receipt · Index as of 2026-09-04 derived

The pattern, elsewhere

This record is one instance of CWE-416, use after free. The index holds 8700 prior instances of this class, 105 KEV-listed. The nearest of its KEV-listed records are drawn beside this. [email protected]

CVE-2026-68820 · Microsoft Windows 10 Version 1607matches 9 of 9KEV listed · 2026receipt
CVE-2025-29824 · Microsoft Windows 10 Version 1507matches 8 of 9KEV listed · 2025receipt
CVE-2021-40449 · Microsoft Windows 10 Version 1809matches 8 of 9KEV listed · 2021receipt
CVE-2025-21334 · Microsoft Windows 10 Version 21H2matches 8 of 9KEV listed · 2025receipt
CVE-2025-21335 · Microsoft Windows 10 Version 21H2matches 8 of 9KEV listed · 2025receipt
CVE-2025-30400 · Microsoft Windows 10 Version 1809matches 8 of 9KEV listed · 2025receipt

"Matches n of m" counts the attributes the two records can both be compared on: the CVSS metrics they share a version of, any weakness class beyond this one, and the vendor. fit-rules@v1

8700 records in this class held. The six above are drawn from the ones CISA has listed as exploited, ranked by how much of the record matches this one. That is why every one of them is KEV-listed: the pool is, so the colour on those spokes says nothing the pool has not already said.

No curated product neighbourhood is held for this product, so the records above are the nearest this index can name. The neighbourhood table covers a small set of products and is extended by hand.

Siblings and hubs

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What usually comes next

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