CVE-2020-1020

CRITICALNVD 8.89.0▲
EchelonGraph scoreHIGH confidence

Score elevated to 9.0 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2021-11-03), indicating real-world exploitation has been confirmed by US federal agencies. NVD baseline CVSS 8.8 retained for reference. Confidence: HIGH.

Triggered by: CISA KEV (actively exploited)
Sources: cisa_kev, epss, ghsa, nvd
Trending — 5 sources updated this weekExploited in the wild
9.0EG
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS PROB: 65%CVSS: 8.8Exploit: cisa kev · ssvc active · epss top5pct · epss high · public exploitExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
8.8
EG Score
9.0(high)
EG Risk
81(Attend)
EG Risk 81/100SSVC: Attend

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity90% × 45%
Exploitation100% × 40%
Automatability0% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
65%
EPSS %ILE
99%
KEV
⚠ Exploited

Published

April 15, 2020

Last Modified

October 29, 2025

Advisory Details (2)

Auto-updated Jun 2, 2026
⚠️ Active exploitation confirmed. Patch available. Sources: cisa, microsoft.
cisa Patch Available🔴 Active Exploitation

Known Exploited Vulnerabilities Catalog | CISA

Known Exploited Vulnerabilities Catalog | CISA. Listed in CISA Known Exploited Vulnerabilities catalog.

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-1020
microsoft Patch Available

Security Update Guide - Microsoft Security Response Center

Security Update Guide - Microsoft Security Response Center. Patch available via Microsoft Security Update

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1020

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

All Vendor Advisories

(1)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 95× in last 7d / 353× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 1,033 total refreshes for this CVE.

  1. 2026-08-21 12:42 UTCVendor advisory
  2. 2026-08-21 12:42 UTCGHSA enrichment
  3. 2026-08-21 08:40 UTCVendor advisory
  4. 2026-08-21 08:40 UTCGHSA enrichment
  5. 2026-08-21 04:38 UTCVendor advisory
  6. 2026-08-21 04:38 UTCGHSA enrichment
  7. 2026-08-21 00:35 UTCEG score recompute
  8. 2026-08-21 00:35 UTCVendor advisory
  9. 2026-08-21 00:35 UTCGHSA enrichment
  10. 2026-08-20 22:52 UTCEPSS rescore
  11. 2026-08-20 20:33 UTCVendor advisory
  12. 2026-08-20 20:33 UTCGHSA enrichment
  13. 2026-08-20 17:06 UTCCISA KEV update
  14. 2026-08-20 16:31 UTCVendor advisory
  15. 2026-08-20 16:31 UTCGHSA enrichment
  16. 2026-08-20 12:28 UTCVendor advisory
  17. 2026-08-20 12:28 UTCGHSA enrichment
  18. 2026-08-20 08:26 UTCVendor advisory
  19. 2026-08-20 08:26 UTCGHSA enrichment
  20. 2026-08-20 04:24 UTCGHSA enrichment
  21. 2026-08-20 00:22 UTCVendor advisory
  22. 2026-08-20 00:22 UTCGHSA enrichment
  23. 2026-08-19 20:20 UTCEG score recompute
  24. 2026-08-19 20:20 UTCVendor advisory
  25. 2026-08-19 20:20 UTCGHSA enrichment
Show 75 more
  1. 2026-08-19 17:33 UTCCISA KEV update
  2. 2026-08-19 17:00 UTCEPSS rescore
  3. 2026-08-19 16:18 UTCVendor advisory
  4. 2026-08-19 16:18 UTCGHSA enrichment
  5. 2026-08-19 12:14 UTCVendor advisory
  6. 2026-08-19 12:14 UTCGHSA enrichment
  7. 2026-08-19 08:12 UTCVendor advisory
  8. 2026-08-19 08:12 UTCGHSA enrichment
  9. 2026-08-19 04:11 UTCVendor advisory
  10. 2026-08-19 04:10 UTCGHSA enrichment
  11. 2026-08-19 00:07 UTCVendor advisory
  12. 2026-08-19 00:07 UTCGHSA enrichment
  13. 2026-08-18 20:04 UTCVendor advisory
  14. 2026-08-18 20:04 UTCGHSA enrichment
  15. 2026-08-18 16:58 UTCCISA KEV update
  16. 2026-08-18 16:02 UTCEG score recompute
  17. 2026-08-18 16:02 UTCVendor advisory
  18. 2026-08-18 16:02 UTCGHSA enrichment
  19. 2026-08-18 13:44 UTCEPSS rescore
  20. 2026-08-18 11:59 UTCVendor advisory
  21. 2026-08-18 11:58 UTCGHSA enrichment
  22. 2026-08-18 07:55 UTCGHSA enrichment
  23. 2026-08-18 03:52 UTCGHSA enrichment
  24. 2026-08-17 23:50 UTCVendor advisory
  25. 2026-08-17 23:50 UTCGHSA enrichment
  26. 2026-08-17 19:48 UTCVendor advisory
  27. 2026-08-17 19:47 UTCGHSA enrichment
  28. 2026-08-17 15:43 UTCEG score recompute
  29. 2026-08-17 15:43 UTCVendor advisory
  30. 2026-08-17 15:43 UTCGHSA enrichment
  31. 2026-08-17 13:56 UTCCISA KEV update
  32. 2026-08-17 13:43 UTCEPSS rescore
  33. 2026-08-17 11:41 UTCVendor advisory
  34. 2026-08-17 11:40 UTCGHSA enrichment
  35. 2026-08-17 07:37 UTCVendor advisory
  36. 2026-08-17 07:37 UTCGHSA enrichment
  37. 2026-08-17 03:35 UTCVendor advisory
  38. 2026-08-17 03:35 UTCGHSA enrichment
  39. 2026-08-16 23:33 UTCVendor advisory
  40. 2026-08-16 23:33 UTCGHSA enrichment
  41. 2026-08-16 19:31 UTCVendor advisory
  42. 2026-08-16 19:31 UTCGHSA enrichment
  43. 2026-08-16 15:29 UTCVendor advisory
  44. 2026-08-16 15:29 UTCGHSA enrichment
  45. 2026-08-16 11:27 UTCVendor advisory
  46. 2026-08-16 11:27 UTCGHSA enrichment
  47. 2026-08-16 07:25 UTCVendor advisory
  48. 2026-08-16 07:25 UTCGHSA enrichment
  49. 2026-08-16 03:23 UTCEG score recompute
  50. 2026-08-16 03:23 UTCVendor advisory
  51. 2026-08-16 03:23 UTCGHSA enrichment
  52. 2026-08-16 02:11 UTCEPSS rescore
  53. 2026-08-15 23:21 UTCVendor advisory
  54. 2026-08-15 23:21 UTCGHSA enrichment
  55. 2026-08-15 19:19 UTCVendor advisory
  56. 2026-08-15 19:19 UTCGHSA enrichment
  57. 2026-08-15 15:17 UTCVendor advisory
  58. 2026-08-15 15:17 UTCGHSA enrichment
  59. 2026-08-15 11:15 UTCVendor advisory
  60. 2026-08-15 11:15 UTCGHSA enrichment
  61. 2026-08-15 07:13 UTCVendor advisory
  62. 2026-08-15 07:13 UTCGHSA enrichment
  63. 2026-08-15 03:11 UTCEG score recompute
  64. 2026-08-15 03:11 UTCVendor advisory
  65. 2026-08-15 03:11 UTCGHSA enrichment
  66. 2026-08-15 01:26 UTCEPSS rescore
  67. 2026-08-14 23:08 UTCVendor advisory
  68. 2026-08-14 23:08 UTCGHSA enrichment
  69. 2026-08-14 19:06 UTCVendor advisory
  70. 2026-08-14 19:06 UTCGHSA enrichment
  71. 2026-08-14 15:04 UTCVendor advisory
  72. 2026-08-14 15:04 UTCGHSA enrichment
  73. 2026-08-14 11:02 UTCGHSA enrichment
  74. 2026-08-14 07:00 UTCVendor advisory
  75. 2026-08-14 07:00 UTCGHSA enrichment

Publicly available exploits

(2 references)

Working exploit code is in the public domain (2 GitHub PoCs). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • GitHub PoCKaLendsi/CVE-2020-1020
    First seen Aug 10, 2021

    Windows Font Driver Type 1 VToHOrigin stack corruption

    Open source ↗
  • GitHub PoCCrackerCat/CVE-2020-1020-Exploit
    First seen Jun 10, 2021
    Open source ↗

Related CVEs(same vendor + same CWE)

Frequently asked(6)

What is CVE-2020-1020?
CVE-2020-1020 is a critical vulnerability published on April 15, 2020. 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…
When was CVE-2020-1020 disclosed?
CVE-2020-1020 was first published in the National Vulnerability Database on April 15, 2020, with the most recent update on October 29, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2020-1020 actively exploited?
Yes. CISA added CVE-2020-1020 to the Known Exploited Vulnerabilities catalog on November 3, 2021, affecting Microsoft Windows. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2020-1020?
CVE-2020-1020 has a CVSS v3 base score of 8.8 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.0.
Which products are affected by CVE-2020-1020?
CVE-2020-1020 affects Microsoft Windows. The full affected-products list, including version ranges and fixed versions, is shown in the Affected Packages section of this page.
How do I remediate CVE-2020-1020?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2020-1020, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2020-1020

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