vciy

CVE-2020-17136

INDEX BUILT · 2026-09-20

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Windows Cloud Files Mini Filter Driver Elevation of Privilege Vulnerability

CVE-2020-171364 of 4 sources documented this
38

rank 38 = 17 + 12 + 1 + 8 + 0

rank@v1 · scheduled

Someone is already using it

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

EPSS 0.13958  ·  without this subject the record ranks 21

What it costs you if it fires

NVD CVSS base score, then the CNA's own

CVSS 4.6, from NVD  ·  without this subject the record ranks 26

It is getting worse, not staying still

FIRST EPSS series, rescorings and bad loads removed

rose on 2025-08-29  ·  without this subject the record ranks 37

How much of the world it touches

NVD CPE configurations

10 products in the CPE ranges  ·  without this subject the record ranks 30

Someone else already set the date

CISA KEV remediation due date

no CISA due date  ·  without this subject the record ranks 38

Unaudited dollar value2 of 3 inputs carry a receipt
Exposure$697,000over the next 30 days, if this record is yours
Movement-$2.60Mon 2022-02-04, the last material move, 4 years, 4 months before this reading
Basisassumeda published average, not your estate

$697,000 = $4.99M incident cost x 1 exposure x 0.13958 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

0.13958EPSSNOT IN KEVas of 2026-09-20
Severity7.8 HIGHreceipt
Harmtotal lossreceipt
Exploitationpublic proof-of-conceptreceipt
Defenseno fix version held
Movementthreshold crossedreceipt
FALLING10Fallen from 0.61283 to 0.13958 across 50 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

Sources disagree here.

Severity score
Microsoft7.8 HIGHreceipt
NVD4.6 MEDIUMreceipt
Scoring standard
MicrosoftCVSS v3.1receipt
NVDCVSS v2.0receipt

Both shown, dated. We don't pick winners. disagreement-rules@v1

Running Microsoft Windows 10 Version 1803? Check your version

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Harm, if it fires from the vector and the weakness

Written for the ticket you're about to file.

Reachneeds local access · low privileges required · no user interaction · low attack complexityreceipt
ImpactComplete confidentiality, integrity and 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 inNo fix version in held sources, as the index stood on 15 Jun 2026.
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: Proof-of-concept published · 2 public repositories, 2021-03-18.

  • RUNG 1Nothing observed in held sources
  • RUNG 2Proof-of-concept published · 2 public repositories2021-03-18receipt
  • RUNG 3Exploited in the wild · CISA KEV listed
  • RUNG 4Ransomware campaign use known

Authority who says so

CVSS, the CNA7.8 HIGHreceipt
CVSS, NVD4.6 MEDIUMreceipt
Exploit probability0.13958 · top 4% of all CVEsreceipt
Blast breadth2 products across 1 vendorderived
Assigned bymicrosoftreceipt
Recorded changes53 · last 19 Sep 2026derived

Affected & Fixed Versions as published

Affected productMicrosoft Windows 10 Version 1803; Microsoft Windows 10 Version 1809; Microsoft Windows 10 Version 1903 for 32-bit Systems; Microsoft Windows 10 Version 1903 for ARM64-based Systems…receipt
Published rangesmicrosoft windows 10 20h2; microsoft windows 10 1803; microsoft windows 10 1809; microsoft windows 10 1903receipt
Show all 10 published ranges
microsoft windows 10 20h2
microsoft windows 10 1803
microsoft windows 10 1809
microsoft windows 10 1903
microsoft windows 10 1909
microsoft windows 10 2004
microsoft windows server 2016 20h2
microsoft windows server 2016 1903
microsoft windows server 2016 1909
microsoft windows server 2016 2004

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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What it is stated by the CNA

Windows Cloud Files Mini Filter Driver Elevation of Privilege Vulnerability receipt

NVD's analysis a second authority

severity
4.6 AV:L/AC:L/Au:N/C:P/I:P/A:P
affected versions
microsoft windows 10 20h2; microsoft windows 10 1803; microsoft windows 10 1809; and 7 more, listed in full below
also scored by
[email protected] 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H · [email protected] 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

The CNA scored it 7.8 and NVD 4.6. Both are shown because both were published; we do not pick one.

check it yourself msrc.microsoft.com receipt

Dated events

2021-09-14EPSS moved 0.61 to 0.182025-03-17EPSS moved 0.00 to 0.822026-06-15EPSS moved 0.85 to 0.14

Movement the material steps

14 Apr 20210.61283
14 Sep 20210.17642 · crossed 0.50
16 Sep 20210.61283 · crossed 0.50
4 Feb 20220.09099 · crossed 0.10 and 0.50
7 Mar 20236.2e-4 · scoring model v2023.03.01
17 Mar 20250.823 · crossed 0.10 and 0.50 · scoring model v2025.03.14
18 Nov 20250.5822
21 Nov 20250.8474
15 Jun 20260.13958 · crossed 0.50 · scoring model v2026.06.15

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

Show all 50 observations
14 Apr 20210.61283
14 Sep 20210.17642
16 Sep 20210.61283
4 Feb 20220.09099
7 Mar 20236.2e-4
8 Mar 20230.00062
25 Aug 20230.00106
13 Dec 20230.00150
12 Jan 20240.00178
27 Mar 20240.00165
31 May 20240.00102
6 Jul 20240.00122
8 Aug 20240.00101
10 Sep 20240.00091
13 Oct 20240.00083
3 Feb 20250.00117
17 Mar 20250.823
19 Mar 20250.85519
20 Mar 20250.81575
22 Mar 20250.78944
26 Mar 20250.7571
27 Mar 20250.81877
28 Mar 20250.76482
29 Mar 20250.81877
30 Mar 20250.76482
14 Apr 20250.78339
2 May 20250.78334
27 Jun 20250.76834
17 Jul 20250.79839
23 Jul 20250.80676
31 Jul 20250.79253
5 Aug 20250.78339
22 Aug 20250.77249
29 Aug 20250.83954
16 Sep 20250.82198
18 Nov 20250.5822
21 Nov 20250.8474
1 Dec 20250.84551
11 Dec 20250.84103
24 Dec 20250.8165
18 Mar 20260.84198
28 Mar 20260.8388
29 Mar 20260.84779
8 Apr 20260.84926
21 Apr 20260.84659
25 Apr 20260.85582
26 May 20260.85752
29 May 20260.84964
8 Jun 20260.84779
15 Jun 20260.13958

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 0.13958Published2020-12-09Public PoC2021-03-18Index as of2026-06-15

Exploit probability more than doubled between 2021-09-14 and 2021-09-16 (0.17642 → 0.61283) and the record had been public for 5 years, 6 months when this index was last written.

Published 2020-12-09 receipt · Public PoC 2021-03-18 receipt · Index as of 2026-06-15 derived

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