CVE-2018-4407

HIGHNVD 8.88.8—
EchelonGraph scoreMEDIUM confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2022-05-14. NVD baseline CVSS 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Elevated
8.8EG
EchelonGraph verdictPlan mitigationSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 21%CVSS: 8.8Exploit: Elevated riskExposed services: Not assessed

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

A memory corruption issue was addressed with improved validation. This issue affected versions prior to iOS 12, macOS Mojave 10.14, tvOS 12, watchOS 5.

CVSS v3
8.8
EG Score
8.8HIGHmedium confidence
EG Risk
60
EG Risk 60/100CISA SSVC

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
Severity88% × 45%
Exploitation40% × 40%
Automatability30% × 15%
CISA SSVC: Track at low or medium mission impact; Track* or Attend at high (mission-essential systems).
Action: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high, and watch the vendor's advisory for the fix.
EPSS PROB
21%
EPSS %ILE
97th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track* or Attend at high (mission-essential systems).

No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high, and watch the vendor's advisory for the fix.

Exploitation public PoC (EG-KEV: elevated) · Automatable unknown (not published for this CVE) · Technical impact partial (CVSS below 9.0). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

April 3, 2019

Last Modified

November 21, 2024

Advisory Details (6)

Auto-updated Aug 31, 2026
No fix on record yet.
generic

About the security content of watchOS 5 - Apple Support

https://support.apple.com/kb/HT209108
generic

About the security content of tvOS 12 - Apple Support

https://support.apple.com/kb/HT209107
generic

About the security content of iOS 12 - Apple Support

https://support.apple.com/kb/HT209106
generic

Locked Out | Packet Storm

http://packetstormsecurity.com/files/172832/iOS-11.4.1-macOS-10.13.6-icmp_error-Heap-Buffer-Overflow.html
generic

About the security content of macOS Mojave 10.14.1, Security Update 2018-002 High Sierra, Security Update 2018-005 Sierra - Apple Support

https://support.apple.com/kb/HT209193
generic

About the security content of macOS Mojave 10.14 - Apple Support

https://support.apple.com/kb/HT209139

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 6× in last 7d / 22× 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 132 total refreshes for this CVE.

  1. 2026-10-05 17:39 UTCEPSS rescore
  2. 2026-10-03 14:21 UTCEPSS rescore
  3. 2026-10-01 19:44 UTCEPSS rescore
  4. 2026-09-30 14:59 UTCEPSS rescore
  5. 2026-09-30 10:02 UTCEG score recompute
  6. 2026-09-29 15:12 UTCEPSS rescore
  7. 2026-09-28 13:46 UTCEPSS rescore
  8. 2026-09-27 13:40 UTCEPSS rescore
  9. 2026-09-26 15:53 UTCEPSS rescore
  10. 2026-09-24 13:59 UTCEPSS rescore
  11. 2026-09-23 13:42 UTCEPSS rescore
  12. 2026-09-21 20:27 UTCEPSS rescore
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  1. 2026-09-01 03:32 UTCEPSS rescore
  2. 2026-08-30 19:13 UTCEPSS rescore
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  4. 2026-08-28 21:36 UTCEPSS rescore
  5. 2026-08-27 14:21 UTCEPSS rescore
  6. 2026-08-26 14:42 UTCEPSS rescore
  7. 2026-08-25 13:45 UTCEPSS rescore
  8. 2026-08-24 14:11 UTCEPSS rescore
  9. 2026-08-21 23:45 UTCEPSS rescore
  10. 2026-08-20 22:51 UTCEPSS rescore
  11. 2026-08-19 17:00 UTCEPSS rescore
  12. 2026-08-18 13:44 UTCEPSS rescore
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  14. 2026-08-16 14:52 UTCEPSS rescore
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  17. 2026-08-13 21:56 UTCEPSS rescore
  18. 2026-08-12 13:47 UTCEPSS rescore
  19. 2026-08-08 16:32 UTCEPSS rescore
  20. 2026-08-07 16:23 UTCEPSS rescore
  21. 2026-08-06 13:42 UTCEPSS rescore
  22. 2026-08-04 15:05 UTCEPSS rescore
  23. 2026-08-02 02:23 UTCEPSS rescore
  24. 2026-08-01 04:12 UTCEPSS rescore
  25. 2026-07-30 16:24 UTCEPSS rescore
  26. 2026-07-30 01:27 UTCEPSS rescore
  27. 2026-07-28 15:32 UTCEPSS rescore
  28. 2026-07-27 14:05 UTCEPSS rescore
  29. 2026-07-26 14:51 UTCEPSS rescore
  30. 2026-07-25 14:14 UTCEPSS rescore
  31. 2026-07-25 14:14 UTCEPSS rescore
  32. 2026-07-24 14:14 UTCEPSS rescore
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  34. 2026-07-23 14:15 UTCEPSS rescore
  35. 2026-07-23 14:15 UTCEPSS rescore
  36. 2026-07-23 01:36 UTCEG score recompute
  37. 2026-07-22 22:16 UTCEG score recompute▼ 0.20
  38. 2026-07-22 14:05 UTCEPSS rescore
  39. 2026-07-21 15:22 UTCEPSS rescore
  40. 2026-07-20 17:04 UTCEPSS rescore
  41. 2026-07-20 17:04 UTCEPSS rescore
  42. 2026-07-19 02:26 UTCEPSS rescore
  43. 2026-07-19 02:26 UTCEPSS rescore
  44. 2026-07-16 16:59 UTCEPSS rescore
  45. 2026-07-16 16:59 UTCEPSS rescore
  46. 2026-07-15 16:55 UTCEPSS rescore
  47. 2026-07-13 22:27 UTCEPSS rescore
  48. 2026-07-13 06:10 UTCEPSS rescore
  49. 2026-07-12 05:43 UTCEPSS rescore
  50. 2026-07-09 19:06 UTCEPSS rescore
  51. 2026-07-08 15:11 UTCEPSS rescore
  52. 2026-07-08 15:11 UTCEPSS rescore
  53. 2026-07-07 13:42 UTCEPSS rescore
  54. 2026-07-07 13:42 UTCEPSS rescore
  55. 2026-07-06 16:25 UTCEPSS rescore
  56. 2026-07-06 16:24 UTCEPSS rescore
  57. 2026-07-06 02:20 UTCEPSS rescore
  58. 2026-07-05 02:27 UTCEPSS rescore
  59. 2026-07-04 06:28 UTCEPSS rescore
  60. 2026-07-04 06:28 UTCEPSS rescore
  61. 2026-07-01 15:03 UTCEPSS rescore
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  63. 2026-06-30 23:20 UTCEPSS rescore
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  65. 2026-06-29 14:03 UTCEPSS rescore
  66. 2026-06-28 14:04 UTCEPSS rescore
  67. 2026-06-28 04:53 UTCEPSS rescore
  68. 2026-06-28 04:53 UTCEPSS rescore
  69. 2026-06-27 03:06 UTCEPSS rescore
  70. 2026-06-27 03:06 UTCEPSS rescore
  71. 2026-06-25 13:47 UTCEPSS rescore
  72. 2026-06-25 13:47 UTCEPSS rescore
  73. 2026-06-24 14:02 UTCEPSS rescore
  74. 2026-06-24 14:02 UTCEPSS rescore
  75. 2026-06-23 21:30 UTCEPSS rescore

Publicly available exploits

(10 references)

Working exploit code is in the public domain (10 GitHub PoCs). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • GitHub PoCpwnhacker0x18/iOS-Kernel-Crash
    First seen Nov 12, 2019

    Exploit for CVE-2018-4407-Memory Corruption

    Open source ↗
  • GitHub PoCzeng9t/CVE-2018-4407-iOS-exploit
    First seen Dec 31, 2018

    CVE-2018-4407,iOS exploit

    Open source ↗
  • GitHub PoCanonymouz4/Apple-Remote-Crash-Tool-CVE-2018-4407
    First seen Nov 7, 2018

    Crashes any macOS High Sierra or iOS 11 device that is on the same WiFi network

    Open source ↗
  • GitHub PoCr3dxpl0it/CVE-2018-4407
    First seen Nov 4, 2018

    IOS/MAC Denial-Of-Service [POC/EXPLOIT FOR MASSIVE ATTACK TO IOS/MAC IN NETWORK]

    Open source ↗
  • GitHub PoCfarisv/AppleDOS
    First seen Nov 2, 2018

    Messing Apple devices on the network with CVE-2018-4407 (heap overflow in bad packet handling)

    Open source ↗
  • GitHub PoCSamDecrock/node-cve-2018-4407
    First seen Nov 2, 2018

    Node.js PoC exploit code for CVE-2018-4407

    Open source ↗
  • GitHub PoCWyAtu/CVE-2018-4407
    First seen Nov 2, 2018

    CVE-2018-4407 IOS/macOS kernel crash

    Open source ↗
  • GitHub PoCzteeed/CVE-2018-4407-IOS
    First seen Nov 2, 2018

    POC: Heap buffer overflow in the networking code in the XNU operating system kernel

    Open source ↗
  • GitHub PoCPa55w0rd/check_icmp_dos
    First seen Nov 1, 2018

    iOS 12 / OS X Remote Kernel Heap Overflow (CVE-2018-4407) POC

    Open source ↗
  • GitHub PoCunixpickle/cve-2018-4407
    First seen Nov 1, 2018

    Crash macOS and iOS devices with one packet

    Open source ↗

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2018-4407?
CVE-2018-4407 is a high vulnerability published on April 3, 2019. A memory corruption issue was addressed with improved validation. This issue affected versions prior to iOS 12, macOS Mojave 10.14, tvOS 12, watchOS 5.
When was CVE-2018-4407 disclosed?
CVE-2018-4407 was first published on April 3, 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-2018-4407 actively exploited?
CVE-2018-4407 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 21% probability of exploitation in the next 30 days (97th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2018-4407?
CVE-2018-4407 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2018-4407?
No fix for CVE-2018-4407 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2018-4407

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