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CVE-2023-28229

INDEX BUILT · 2026-09-20

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Windows CNG Key Isolation Service Elevation of Privilege Vulnerability

CVE-2023-282294 of 4 sources documented this
72

rank 72 = 40 + 18 + 0 + 8 + 6

rank@v1 · act now

Someone is already using it

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

EPSS 0.01671 · CISA KEV listed  ·  without this subject the record ranks 32

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 54

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 72

How much of the world it touches

NVD CPE configurations

10 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 66

Unaudited dollar value2 of 3 inputs carry a receipt
Exposure$83,400over the next 30 days, if this record is yours
Movement-$77,500on 2026-04-29, the last material move, 4 months before this reading
Basisassumeda published average, not your estate

$83,400 = $4.99M incident cost x 1 exposure x 0.01671 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

0.01671EPSSKEV · LISTED
Severity7 HIGHreceipt
Harmtotal lossreceipt
Exploitationin the wild · KEVreceipt
Defensefix version namedreceipt
Movementdoubled within 72hreceipt
PLATEAU10Minimal movement since 2025-11-21, 287 days at 0.02, as of 2026-09-04. 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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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-591 Sensitive Data Storage in Improperly Locked Memoryreceipt
Published consequencesCWE-591: Confidentiality: Read Application Data, Read Memory[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 in10.0.17763.4252; 10.0.20348.1668; 10.0.19042.2846; 10.0.22000.1817; 10.0.19044.2846; 10.0.22621.1555; 10.0.19045.2846; 10.0.10240.19869; 10.0.14393.5850…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.
CISA remediation statusoverdue since 2023-10-25receipt
CISA required actionApply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.receipt
Published to CISA KEV176 daysderived

Exploit Status & Known PoCs a ladder, not a score

Current rung: Exploited in the wild · CISA KEV listed, 2023-10-04.

  • RUNG 1Nothing observed in held sources
  • RUNG 2Proof-of-concept published · 2 public repositories2023-09-04receipt
  • RUNG 3Exploited in the wild · CISA KEV listed2023-10-04receipt
  • RUNG 4Ransomware campaign use known

Authority who says so

CVSS, the CNA7 HIGHreceipt
Exploit probability0.01671 · top 24% of all CVEsreceipt
Blast breadth2 products across 1 vendorderived
Assigned bymicrosoftreceipt
Recorded changes64 · 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 < 10.0.10240.19869; microsoft windows 10 1607 < 10.0.14393.5850; microsoft windows 10 1809 < 10.0.17763.4252; microsoft windows 10 20h2 < 10.0.19042.2846receipt
Show all 10 published ranges
microsoft windows 10 1507 < 10.0.10240.19869
microsoft windows 10 1607 < 10.0.14393.5850
microsoft windows 10 1809 < 10.0.17763.4252
microsoft windows 10 20h2 < 10.0.19042.2846
microsoft windows 10 21h2 < 10.0.19044.2846
microsoft windows 10 22h2 < 10.0.19045.2846
microsoft windows 11 21h2 < 10.0.22000.1817
microsoft windows 11 22h2 < 10.0.22621.1555
microsoft windows server 2008 r2
microsoft windows server 2012 r2
Fixed in10.0.17763.4252; 10.0.20348.1668; 10.0.19042.2846; 10.0.22000.1817; 10.0.19044.2846; 10.0.22621.1555; 10.0.19045.2846; 10.0.10240.19869; 10.0.14393.5850…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

Local accessrequires low privilegesCISA KEV listingadded 10-04 · due 10-25Microsoft Windows Server 2019CWE-591 weaknessFull compromise (C/I/A)C:H / I:H / A:Hmandates remediationexploits CWE-591data compromise

What it is stated by the CNA

Windows CNG Key Isolation Service Elevation of Privilege Vulnerability receipt

NVD's analysis a second authority

weakness
CWE-591
affected versions
microsoft windows 10 1507 < 10.0.10240.19869; microsoft windows 10 1607 < 10.0.14393.5850; microsoft windows 10 1809 < 10.0.17763.4252; and 7 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

2023-10-04Added to CISA KEV2023-10-25CISA remediation due2024-08-15EPSS moved 0.00 to 0.422026-06-15EPSS moved 0.09 to 0.02

Movement the material steps

12 Apr 20230.00043
15 Aug 20240.42309 · crossed 0.10
25 Aug 20240.02237 · crossed 0.10
17 Mar 20250.07919 · scoring model v2025.03.14
25 Mar 20250.13466 · crossed 0.10
15 Apr 20250.07065 · crossed 0.10
18 Nov 20250.14419 · crossed 0.10
21 Nov 20250.07158 · crossed 0.10
12 Apr 20260.1019 · crossed 0.10
29 Apr 20260.08636 · crossed 0.10
15 Jun 20260.01872 · scoring model v2026.06.15
1 Sep 20260.01671

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

Show all 50 observations
12 Apr 20230.00043
13 Apr 20230.00048
8 May 20230.00224
13 May 20230.00269
14 May 20230.00192
16 Jun 20230.00086
8 Jul 20230.00063
14 Jul 20230.00054
15 Jul 20230.00048
5 Sep 20230.00197
5 Oct 20230.00073
31 Dec 20230.00152
13 Jan 20240.00107
5 Feb 20240.00152
11 Mar 20240.00329
23 Mar 20240.00142
6 Apr 20240.00222
17 Apr 20240.00233
30 Apr 20240.00164
13 May 20240.00344
25 May 20240.00079
7 Jun 20240.00136
20 Jun 20240.00077
16 Jul 20240.00118
29 Jul 20240.00134
12 Aug 20240.00158
15 Aug 20240.42309
25 Aug 20240.02237
8 Sep 20240.01434
1 Nov 20240.00616
30 Nov 20240.00491
14 Dec 20240.00445
17 Dec 20240.01657
28 Jan 20250.01156
10 Mar 20250.00904
11 Mar 20250.00241
17 Mar 20250.07919
25 Mar 20250.13466
15 Apr 20250.07065
25 Sep 20250.06941
22 Oct 20250.07325
29 Oct 20250.07158
18 Nov 20250.14419
21 Nov 20250.07158
26 Mar 20260.09054
12 Apr 20260.1019
29 Apr 20260.08636
15 Jun 20260.01872
11 Aug 20260.01771
1 Sep 20260.01671

50 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 0.01671Published2023-04-11Public PoC2023-09-04CISA KEV2023-10-04Index as of2026-09-04

Listed by CISA 176 days after it published, exploit probability more than doubled between 2024-08-12 and 2024-08-15 (0.00158 → 0.42309) and the record had been public for 3 years, 4 months when this index was last written.

Published 2023-04-11 receipt · Public PoC 2023-09-04 receipt · CISA KEV 2023-10-04 receipt · Index as of 2026-09-04 derived

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