CVE-2020-15999

CRITICALNVD 9.69.6—
EchelonGraph scoreHIGH confidence

Score elevated to 9.6 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 9.6 retained for reference. Confidence: HIGH.

Triggered by: CISA KEV (actively exploited)
Sources: cisa_kev, epss, nvd
Trending — 4 sources updated this weekExploited in the wild
9.6
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS: 51%CVSS: 9.6Exploit: NoneExposed: 0

A fix is available — apply it.

Heap buffer overflow in Freetype in Google Chrome prior to 86.0.4240.111 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.

CVSS v3
9.6
EG Score
9.6(high)
EPSS
98.8%
KEV
⚠ Exploited

Published

November 3, 2020

Last Modified

October 24, 2025

Advisory Details (9)

Auto-updated Jun 1, 2026
⚠️ Active exploitation confirmed. No patch confirmed yet.
generic

[SECURITY] [DSA 4824-1] chromium security update

https://www.debian.org/security/2021/dsa-4824
generic

Opera: Multiple Vulnerabilities (GLSA 202401-19) — Gentoo security

https://security.gentoo.org/glsa/202401-19
generic

Mozilla Thunderbird: Multiple vulnerabilities (GLSA 202012-04) — Gentoo security

https://security.gentoo.org/glsa/202012-04
generic

Chromium, Google Chrome: Multiple vulnerabilities (GLSA 202011-12) — Gentoo security

https://security.gentoo.org/glsa/202011-12
generic

[SECURITY] Fedora 31 Update: freetype-2.10.0-4.fc31 - package-announce - Fedora mailing-lists

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/J3QVIGAAJ4D62YEJAJJWMCCBCOQ6TVL7/
generic🔴 Active Exploitation

Project Zero: CVE-2020-15999: FreeType Heap Buffer Overflow in Load_SBit_Png

https://googleprojectzero.blogspot.com/p/rca-cve-2020-15999.html
generic
https://crbug.com/1139963
generic🔴 Active Exploitation

Chrome Releases: Stable Channel Update for Desktop

https://chromereleases.googleblog.com/2020/10/stable-channel-update-for-desktop_20.html
generic

Full Disclosure: TCMalloc viewer/dumper - TCMalloc Inspector Tool

http://seclists.org/fulldisclosure/2020/Nov/33

Patch Availability(8)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulibfreetype6-udeb (2.6.1-0.1ubuntu2.5) @ xenial2026-07-11ubuntu
ubuntulibfreetype6 (2.5.2-1ubuntu2.8+esm2) @ trusty2026-07-11ubuntu
redhatfreetype-0:2.9.1-4.el8_1.12020-11-05redhat
redhatfreetype-0:2.9.1-4.el8_2.12020-11-05redhat
redhatfreetype-0:2.9.1-4.el8_3.12020-11-05redhat
redhatfreetype-0:2.9.1-4.el8_0.12020-11-05redhat
redhatfreetype-0:2.8-14.el7_9.12020-11-04redhat
redhatchromium-browser-0:86.0.4240.111-1.el6_102020-10-26redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(4 across 1 ecosystem)
NuGet(4)
PackageVulnerable rangeFixed inDependents
CefSharp.Common31.0.0-pre1 ... 85.3.121-pre (85 versions)85.3.130—
CefSharp.WinForms1.25.3 ... 85.3.121-pre (84 versions)85.3.130—
CefSharp.Wpf1.25.2-perlun0 ... 85.3.121-pre (92 versions)85.3.130—
CefSharp.Wpf.HwndHost83.4.20-pre, 84.4.10, 85.3.12185.3.130—

Weakness Classification(2)

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

All Vendor Advisories

(9)

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 91× in last 7d / 406× 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 571 total refreshes for this CVE.

  1. 2026-07-11 23:41 UTCEG score recompute
  2. 2026-07-11 23:41 UTCVendor advisory
  3. 2026-07-11 19:48 UTCEG score recompute
  4. 2026-07-11 19:48 UTCVendor advisory
  5. 2026-07-11 15:55 UTCEG score recompute
  6. 2026-07-11 15:55 UTCVendor advisory
  7. 2026-07-11 12:02 UTCEG score recompute
  8. 2026-07-11 12:02 UTCVendor advisory
  9. 2026-07-11 08:08 UTCEG score recompute
  10. 2026-07-11 08:08 UTCVendor advisory
  11. 2026-07-11 04:15 UTCEG score recompute
  12. 2026-07-11 04:15 UTCVendor advisory
  13. 2026-07-11 00:21 UTCEG score recompute
  14. 2026-07-11 00:21 UTCVendor advisory
  15. 2026-07-10 20:27 UTCEG score recompute
  16. 2026-07-10 20:27 UTCVendor advisory
  17. 2026-07-10 17:52 UTCCISA KEV update
  18. 2026-07-10 16:34 UTCEG score recompute
  19. 2026-07-10 16:34 UTCVendor advisory
  20. 2026-07-10 12:40 UTCEG score recompute
  21. 2026-07-10 12:40 UTCVendor advisory
  22. 2026-07-10 08:47 UTCEG score recompute
  23. 2026-07-10 08:47 UTCVendor advisory
  24. 2026-07-10 04:52 UTCEG score recompute
  25. 2026-07-10 04:52 UTCVendor advisory
Show 75 more
  1. 2026-07-10 00:58 UTCEG score recompute
  2. 2026-07-10 00:58 UTCVendor advisory
  3. 2026-07-09 21:05 UTCEG score recompute
  4. 2026-07-09 21:05 UTCVendor advisory
  5. 2026-07-09 19:07 UTCEPSS rescore
  6. 2026-07-09 17:12 UTCEG score recompute
  7. 2026-07-09 17:12 UTCVendor advisory
  8. 2026-07-09 13:19 UTCEG score recompute
  9. 2026-07-09 13:19 UTCVendor advisory
  10. 2026-07-09 09:25 UTCEG score recompute
  11. 2026-07-09 09:25 UTCVendor advisory
  12. 2026-07-09 05:32 UTCEG score recompute
  13. 2026-07-09 05:32 UTCVendor advisory
  14. 2026-07-09 01:40 UTCEG score recompute
  15. 2026-07-09 01:40 UTCVendor advisory
  16. 2026-07-08 21:46 UTCEG score recompute
  17. 2026-07-08 21:46 UTCVendor advisory
  18. 2026-07-08 17:53 UTCEG score recompute
  19. 2026-07-08 17:53 UTCVendor advisory
  20. 2026-07-08 15:12 UTCEPSS rescore
  21. 2026-07-08 13:59 UTCEG score recompute
  22. 2026-07-08 13:59 UTCVendor advisory
  23. 2026-07-08 10:06 UTCEG score recompute
  24. 2026-07-08 10:06 UTCVendor advisory
  25. 2026-07-08 06:12 UTCEG score recompute
  26. 2026-07-08 06:12 UTCVendor advisory
  27. 2026-07-08 02:19 UTCEG score recompute
  28. 2026-07-08 02:19 UTCVendor advisory
  29. 2026-07-07 22:26 UTCEG score recompute
  30. 2026-07-07 22:26 UTCVendor advisory
  31. 2026-07-07 19:01 UTCCISA KEV update
  32. 2026-07-07 18:33 UTCEG score recompute
  33. 2026-07-07 18:33 UTCVendor advisory
  34. 2026-07-07 17:16 UTCCISA KEV update
  35. 2026-07-07 14:40 UTCEG score recompute
  36. 2026-07-07 14:40 UTCVendor advisory
  37. 2026-07-07 10:46 UTCEG score recompute
  38. 2026-07-07 10:46 UTCVendor advisory
  39. 2026-07-07 06:50 UTCEG score recompute
  40. 2026-07-07 06:50 UTCVendor advisory
  41. 2026-07-07 02:57 UTCEG score recompute
  42. 2026-07-07 02:57 UTCVendor advisory
  43. 2026-07-06 23:04 UTCEG score recompute
  44. 2026-07-06 23:04 UTCVendor advisory
  45. 2026-07-06 19:11 UTCEG score recompute
  46. 2026-07-06 19:11 UTCVendor advisory
  47. 2026-07-06 15:18 UTCEG score recompute
  48. 2026-07-06 15:18 UTCVendor advisory
  49. 2026-07-06 11:25 UTCEG score recompute
  50. 2026-07-06 11:25 UTCVendor advisory
  51. 2026-07-06 07:32 UTCEG score recompute
  52. 2026-07-06 07:32 UTCVendor advisory
  53. 2026-07-06 03:39 UTCEG score recompute
  54. 2026-07-06 03:39 UTCVendor advisory
  55. 2026-07-05 23:46 UTCEG score recompute
  56. 2026-07-05 23:46 UTCVendor advisory
  57. 2026-07-05 19:53 UTCEG score recompute
  58. 2026-07-05 19:53 UTCVendor advisory
  59. 2026-07-05 16:00 UTCEG score recompute
  60. 2026-07-05 16:00 UTCVendor advisory
  61. 2026-07-05 12:07 UTCEG score recompute
  62. 2026-07-05 12:07 UTCVendor advisory
  63. 2026-07-05 08:14 UTCEG score recompute
  64. 2026-07-05 08:14 UTCVendor advisory
  65. 2026-07-05 04:20 UTCEG score recompute
  66. 2026-07-05 04:20 UTCVendor advisory
  67. 2026-07-05 00:27 UTCEG score recompute
  68. 2026-07-05 00:27 UTCVendor advisory
  69. 2026-07-04 20:32 UTCEG score recompute
  70. 2026-07-04 20:32 UTCVendor advisory
  71. 2026-07-04 16:39 UTCEG score recompute
  72. 2026-07-04 16:39 UTCVendor advisory
  73. 2026-07-04 12:46 UTCEG score recompute
  74. 2026-07-04 12:46 UTCVendor advisory
  75. 2026-07-04 08:53 UTCEG score recompute

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 PoCMarmeus/CVE-2020-15999
    First seen Dec 30, 2020

    Todos los materiales necesarios para la PoC en Chrome y ftview

    Open source ↗
  • GitHub PoCoxfemale/CVE-2020-15999
    First seen Nov 4, 2020

    CVE-2020-15999

    Open source ↗

Related CVEs(same vendor + same CWE)

Frequently asked(6)

What is CVE-2020-15999?
CVE-2020-15999 is a critical vulnerability published on November 3, 2020. Heap buffer overflow in Freetype in Google Chrome prior to 86.0.4240.111 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.
When was CVE-2020-15999 disclosed?
CVE-2020-15999 was first published in the National Vulnerability Database on November 3, 2020, with the most recent update on October 24, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2020-15999 actively exploited?
Yes. CISA added CVE-2020-15999 to the Known Exploited Vulnerabilities catalog on November 3, 2021, affecting Google Chrome FreeType. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2020-15999?
CVE-2020-15999 has a CVSS v3 base score of 9.6 (NVD).
Which products are affected by CVE-2020-15999?
CVE-2020-15999 affects Google Chrome FreeType. 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-2020-15999?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2020-15999, 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2020-15999

Explore →

Is Your Infrastructure Affected by CVE-2020-15999?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs