vciy

CVE-2020-1020

INDEX BUILT · 2026-09-20

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A remote code execution vulnerability exists in Microsoft Windows when the Windows Adobe Type Manager Library improperly handles a specially-crafted…

CVE-2020-10204 of 4 sources documented this
72

rank 72 = 40 + 22 + 0 + 4 + 6

rank@v1 · act now

Someone is already using it

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

EPSS 0.65037 · 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 8.8, from NVD  ·  without this subject the record ranks 50

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

2 products in the CPE ranges  ·  without this subject the record ranks 68

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$3.25Mover the next 30 days, if this record is yours
Movement-$117,000on 2025-06-01, the last material move, 1 year, 3 months before this reading
Basisassumeda published average, not your estate

$3.25M = $4.99M incident cost x 1 exposure x 0.65037 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

0.65037EPSSKEV · LISTED
Severity8.8 HIGHreceipt
Harmtotal lossreceipt
Exploitationin the wild · KEVreceipt
Defenseno fix version held
Movementscoring model changedreceipt
RISING10Risen from 0.09575 to 0.65037 across 65 observations. arc-rules@v1

Foresight · where to check next

Google ChromeMicrosoftFortinetFortinet1020

This record is one instance of CWE-787, out-of-bounds write. The index holds 14893 prior instances of this class, 164 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

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Harm, if it fires from the vector and the weakness

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Reachnetwork-reachable · no privileges required · user interaction required · low attack complexityreceipt
ImpactComplete confidentiality, integrity and availability lossreceipt
Scored fromCVSS v3.1 · NVD's vectorreceipt
Weakness classCWE-787 Out-of-bounds Writereceipt
Published consequencesCWE-787: Integrity: Modify Memory, Execute Unauthorized Code or Commands; Availability: DoS: Crash, Exit, or Restart; Other: Unexpected State[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 inNo fix version in held sources, as the index stood on 4 Sep 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.
CISA remediation statusoverdue since 2022-05-03receipt
CISA required actionApply updates per vendor instructions.receipt
Published to CISA KEV567 daysderived

Exploit Status & Known PoCs a ladder, not a score

Current rung: Exploited in the wild · CISA KEV listed, 2021-11-03.

  • RUNG 1Nothing observed in held sources
  • RUNG 2Proof-of-concept published · 2 public repositories2021-06-10receipt
  • RUNG 3Exploited in the wild · CISA KEV listed2021-11-03receipt
  • RUNG 4Ransomware campaign use known

Authority who says so

CVSS, NVD8.8 HIGHreceipt
Exploit probability0.65037 · top 0.79% of all CVEsreceipt
Blast breadth1 product across 1 vendorderived
Assigned bymicrosoftreceipt
Recorded changes79 · last 19 Sep 2026derived

Affected & Fixed Versions as published

Affected productMicrosoft Windows; Microsoft Windows Server; Microsoft Windows 10 Version 1909 for 32-bit Systems; Microsoft Windows 10 Version 1909 for x64-based Systems…receipt
Published rangesmicrosoft windows server 2008 r2; microsoft windows server 2012 r2receipt

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

A remote code execution vulnerability exists in Microsoft Windows when the Windows Adobe Type Manager Library improperly handles a specially-crafted multi-master font - Adobe Type 1 PostScript format.For all systems except Windows 10, an attacker who successfully exploited the vulnerability could execute code remotely, aka 'Adobe Font Manager Library Remote Code Execution Vulnerability'. This CVE ID is unique from CVE-2020-0938. receipt

NVD's analysis a second authority

severity
8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
weakness
CWE-787
affected versions
microsoft windows server 2008 r2; microsoft windows server 2012 r2
also scored by
8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

check it yourself portal.msrc.microsoft.com receipt

Dated events

2021-05-18EPSS moved 0.10 to 0.322021-11-03Added to CISA KEV2022-05-03CISA remediation due2023-03-07EPSS moved 0.37 to 0.852026-06-15EPSS moved 0.86 to 0.65

Movement the material steps

14 Apr 20210.09575
18 May 20210.32208 · crossed 0.10
7 Mar 20230.85039 · crossed 0.50 · scoring model v2023.03.01
8 Jul 20230.94760 · crossed 0.90
17 Mar 20250.90189 · scoring model v2025.03.14
1 Jun 20250.87842 · crossed 0.90
15 Jun 20260.65037 · scoring model v2026.06.15
Show all 65 observations
14 Apr 20210.09575
18 May 20210.32208
4 Feb 20220.37706
8 Dec 20220.3686
7 Mar 20230.85039
8 Mar 20230.84085
22 Mar 20230.84579
19 Apr 20230.89011
19 May 20230.89931
2 Jun 20230.89563
8 Jul 20230.94760
18 Jul 20230.94203
19 Aug 20230.93348
3 Sep 20230.92867
3 Feb 20240.93466
8 Apr 20240.91198
22 Apr 20240.91298
9 May 20240.92568
25 May 20240.94940
27 Aug 20240.94679
17 Dec 20240.94607
17 Mar 20250.90189
19 Mar 20250.90171
22 Mar 20250.90189
25 Mar 20250.90171
26 Mar 20250.90189
1 Apr 20250.90171
2 Apr 20250.90189
15 Apr 20250.90171
16 Apr 20250.90189
19 Apr 20250.90171
20 Apr 20250.90189
1 May 20250.90171
5 May 20250.90189
1 Jun 20250.87842
4 Jun 20250.8787
1 Jul 20250.87842
4 Jul 20250.8787
1 Aug 20250.87842
5 Aug 20250.8787
1 Sep 20250.87842
4 Sep 20250.8787
1 Oct 20250.88681
4 Oct 20250.88706
22 Oct 20250.86425
27 Oct 20250.86203
28 Oct 20250.86425
1 Nov 20250.86391
4 Nov 20250.86425
18 Nov 20250.89315
21 Nov 20250.86425
1 Dec 20250.86391
4 Dec 20250.86425
18 Dec 20250.87984
27 Dec 20250.87804
28 Dec 20250.87984
1 Jan 20260.87956
4 Jan 20260.87984
1 Feb 20260.87956
4 Feb 20260.87984
1 Mar 20260.87956
4 Mar 20260.87984
11 Mar 20260.88175
1 Apr 20260.85678
15 Jun 20260.65037

65 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 0.65037Published2020-04-15Public PoC2021-06-10CISA KEV2021-11-03Index as of2026-09-04

Listed by CISA 567 days after it published and the record had been public for 6 years, 4 months when this index was last written.

No material movement in 81 days as of the last ingest this index recorded.

Published 2020-04-15 receipt · Public PoC 2021-06-10 receipt · CISA KEV 2021-11-03 receipt · Index as of 2026-09-04 derived

The pattern, elsewhere

This record is one instance of CWE-787, out-of-bounds write. The index holds 14893 prior instances of this class, 164 KEV-listed. The nearest of its KEV-listed records are drawn beside this. [email protected]

CVE-2022-2294 · Google Chromematches 8 of 9KEV listed · 2022receipt
CVE-2020-0968 · Microsoft Internet Explorer 9matches 8 of 9KEV listed · 2020receipt
CVE-2019-1367 · Microsoft Internet Explorer 9matches 8 of 9KEV listed · 2019receipt
CVE-2024-21762 · Fortinet FortiProxymatches 7 of 9KEV listed · 2024receipt
CVE-2022-42475 · Fortinet FortiProxymatches 7 of 9KEV listed · 2023receipt
CVE-2023-27997 · Fortinet FortiOS-6K7Kmatches 7 of 9KEV listed · 2023receipt

"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

14893 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.

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