CVE-2019-8641

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.8 under NVD CVSS v3. EPSS exploit probability: 17.0%, top 3% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
Weaponized
9.8EG
EchelonGraph verdictPatch this weekExploitation is likely or a public exploit exists.
  • Public exploit code is available (Exploit-DB (verified), epss top5pct, public exploit)
CISA-KEV: Not listedEPSS PROB: 17%CVSS: 9.8Exploit: Exploit-DB (verified) · epss top5pct · public exploitExposed: 0

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

An out-of-bounds read was addressed with improved input validation.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
75(Track*)
EG Risk 75/100SSVC: Track*

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
Severity98% × 45%
Exploitation65% × 40%
Automatability30% × 15%
Action: Watch closely — could escalate to Attend.
EPSS PROB
17%
EPSS %ILE
97%
KEV
Not listed

Published

December 18, 2019

Last Modified

November 21, 2024

Advisory Details (5)

Auto-updated Aug 16, 2026
No patch confirmed yet.
generic

About the security content of watchOS 6 - Apple Support

https://support.apple.com/HT210607
generic

About the security content of iOS 13 - Apple Support

https://support.apple.com/HT210606
generic

About the security content of iOS 12.4.2 - Apple Support

https://support.apple.com/HT210590
generic

About the security content of macOS Mojave 10.14.6 Supplemental Update 2, Security Update 2019-005 High Sierra, and Security Update 2019-005 Sierra - Apple Support

https://support.apple.com/HT210589
generic

About the security content of watchOS 5.3.2 - Apple Support

https://support.apple.com/HT210588

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 4× in last 7d / 19× 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 106 total refreshes for this CVE.

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

Publicly available exploits

(3 references)

Working exploit code is in the public domain (1 GitHub PoC) (2 Exploit-DB entries). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • GitHub PoCchia33164/CVE-2019-8641-reproduction
    First seen May 29, 2020

    The reproduction code for CVE-2019-8641.

    Open source ↗
  • Exploit-DBEDB-47608✓ verified
    First seen Nov 11, 2019

    iMessage - Decoding NSSharedKeyDictionary can read ObjC Object at Attacker Controlled Address

    Open source ↗
  • Exploit-DBEDB-47415✓ verified
    First seen Sep 24, 2019

    iMessage - Decoding NSSharedKeyDictionary Can Read Object Out of Bounds

    Open source ↗

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2019-8641?
CVE-2019-8641 is a critical vulnerability published on December 18, 2019. An out-of-bounds read was addressed with improved input validation.
When was CVE-2019-8641 disclosed?
CVE-2019-8641 was first published in the National Vulnerability Database on December 18, 2019, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2019-8641 actively exploited?
CVE-2019-8641 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 17% probability of exploitation in the next 30 days, which ranks it in the top 3.2% of all scored CVEs.
What is the CVSS score of CVE-2019-8641?
CVE-2019-8641 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2019-8641?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2019-8641, 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-2019-8641

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