CVE-2018-4404

HIGHNVD 8.88.8—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.8 under NVD CVSS v3. EPSS exploit probability: 14% (96th percentile of EPSS-scored CVEs). GitHub Security Advisory enrichment pending alignment with NVD CVSS.

Triggered by: NVD CVSS baseline
Sources: epss, ghsa, nvd
Weaponized
8.8EG
EchelonGraph verdictMitigate this weekExploitation is likely or a public exploit exists.
  • Public exploit code is available (Metasploit, Exploit-DB (verified), ssvc poc, epss top5pct, public exploit)
CISA-KEV: Not listedEPSS PROB: 14%CVSS: 8.8Exploit: Metasploit · Exploit-DB (verified) · ssvc poc · epss top5pct · public exploitExposed services: Not assessed

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

In iOS before 11.4 and macOS High Sierra before 10.13.5, a memory corruption issue exists and was addressed with improved memory handling.

CVSS v3
8.8
EG Score
8.8HIGHmedium confidence
EG Risk
66
EG Risk 66/100CISA 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%
Exploitation65% × 40%
Automatability0% × 15%
CISA SSVC: Track at low, Track* at medium and Attend at high mission impact.
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
14%
EPSS %ILE
96th
KEV
Not listed

CISA SSVCTrack at low, Track* at medium and Attend at high mission impact.

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 (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). 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

January 11, 2019

Last Modified

November 21, 2024

Advisory Details (3)

Auto-updated Aug 24, 2026
🔬 Proof of concept available. No fix on record yet.
generic🟡 PoC Available

Safari - Proxy Object Type Confusion (Metasploit) - macOS remote Exploit

https://www.exploit-db.com/exploits/45998/
generic

About the security content of macOS High Sierra 10.13.5, Security Update 2018-003 Sierra, Security Update 2018-003 El Capitan - Apple Support

https://support.apple.com/HT208849
generic

Page Not Found - Official Apple Support

https://support.apple.com/HT208848%2C

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 6× in last 7d / 20× 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 133 total refreshes for this CVE.

  1. 2026-10-04 23:18 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. 2026-09-27 13:40 UTCEPSS rescore
  8. 2026-09-26 15:53 UTCEPSS rescore
  9. 2026-09-24 13:59 UTCEPSS rescore
  10. 2026-09-23 13:42 UTCEPSS rescore
  11. 2026-09-21 20:27 UTCEPSS rescore
  12. 2026-09-20 20:10 UTCEPSS rescore
  13. 2026-09-19 15:36 UTCEPSS rescore
  14. 2026-09-18 19:22 UTCEPSS rescore
  15. 2026-09-17 19:22 UTCEPSS rescore
  16. 2026-09-15 03:05 UTCEPSS rescore
  17. 2026-09-15 03:05 UTCEPSS rescore
  18. 2026-09-11 14:48 UTCEPSS rescore
  19. 2026-09-11 09:32 UTCEPSS rescore
  20. 2026-09-06 13:44 UTCEPSS rescore
  21. 2026-09-04 13:56 UTCEPSS rescore
  22. 2026-09-04 05:02 UTCEPSS rescore
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  24. 2026-09-01 03:32 UTCEPSS rescore
  25. 2026-08-30 19:13 UTCEPSS rescore
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  1. 2026-08-30 01:18 UTCEPSS rescore
  2. 2026-08-28 21:36 UTCEPSS rescore
  3. 2026-08-27 14:21 UTCEPSS rescore
  4. 2026-08-26 14:42 UTCEPSS rescore
  5. 2026-08-25 13:45 UTCEPSS rescore
  6. 2026-08-24 14:11 UTCEPSS rescore
  7. 2026-08-21 23:45 UTCEPSS rescore
  8. 2026-08-20 22:51 UTCEPSS rescore
  9. 2026-08-19 17:00 UTCEPSS rescore
  10. 2026-08-18 13:44 UTCEPSS rescore
  11. 2026-08-16 14:52 UTCEPSS rescore
  12. 2026-08-16 02:10 UTCEPSS rescore
  13. 2026-08-15 01:26 UTCEPSS rescore
  14. 2026-08-13 21:56 UTCEPSS rescore
  15. 2026-08-12 13:47 UTCEPSS rescore
  16. 2026-08-09 13:43 UTCEPSS rescore
  17. 2026-08-08 16:32 UTCEPSS rescore
  18. 2026-08-07 16:23 UTCEPSS rescore
  19. 2026-08-06 13:42 UTCEPSS rescore
  20. 2026-08-04 15:05 UTCEPSS rescore
  21. 2026-08-04 10:33 UTCEPSS rescore
  22. 2026-08-02 02:23 UTCEPSS rescore
  23. 2026-08-01 04:12 UTCEPSS rescore
  24. 2026-07-30 16:24 UTCEPSS rescore
  25. 2026-07-30 01:27 UTCEPSS rescore
  26. 2026-07-28 15:32 UTCEPSS rescore
  27. 2026-07-27 14:05 UTCEPSS rescore
  28. 2026-07-26 14:51 UTCEPSS rescore
  29. 2026-07-25 14:14 UTCEPSS rescore
  30. 2026-07-25 14:14 UTCEPSS rescore
  31. 2026-07-24 14:14 UTCEPSS rescore
  32. 2026-07-24 14:14 UTCEPSS rescore
  33. 2026-07-23 14:15 UTCEPSS rescore
  34. 2026-07-23 14:15 UTCEPSS rescore
  35. 2026-07-23 01:36 UTCEG score recompute
  36. 2026-07-22 22:16 UTCEG score recompute▲ 1.00
  37. 2026-07-22 14:05 UTCEPSS rescore
  38. 2026-07-21 15:22 UTCEPSS rescore
  39. 2026-07-20 17:04 UTCEPSS rescore
  40. 2026-07-20 17:04 UTCEPSS rescore
  41. 2026-07-19 02:26 UTCEPSS rescore
  42. 2026-07-19 02:26 UTCEPSS rescore
  43. 2026-07-16 16:59 UTCEPSS rescore
  44. 2026-07-16 16:59 UTCEPSS rescore
  45. 2026-07-15 16:55 UTCEPSS rescore
  46. 2026-07-15 01:56 UTCEPSS rescore
  47. 2026-07-13 22:27 UTCEPSS rescore
  48. 2026-07-12 05:43 UTCEPSS rescore
  49. 2026-07-09 19:06 UTCEPSS rescore
  50. 2026-07-08 15:11 UTCEPSS rescore
  51. 2026-07-08 15:11 UTCEPSS rescore
  52. 2026-07-07 13:42 UTCEPSS rescore
  53. 2026-07-07 13:42 UTCEPSS rescore
  54. 2026-07-06 16:25 UTCEPSS rescore
  55. 2026-07-06 16:24 UTCEPSS rescore
  56. 2026-07-06 02:20 UTCEPSS rescore
  57. 2026-07-05 02:27 UTCEPSS rescore
  58. 2026-07-04 06:28 UTCEPSS rescore
  59. 2026-07-04 06:28 UTCEPSS rescore
  60. 2026-07-01 15:03 UTCEPSS rescore
  61. 2026-07-01 15:03 UTCEPSS rescore
  62. 2026-06-30 23:20 UTCEPSS rescore
  63. 2026-06-30 23:20 UTCEPSS rescore
  64. 2026-06-29 14:03 UTCEPSS rescore
  65. 2026-06-28 14:04 UTCEPSS rescore
  66. 2026-06-28 04:53 UTCEPSS rescore
  67. 2026-06-28 04:53 UTCEPSS rescore
  68. 2026-06-27 03:06 UTCEPSS rescore
  69. 2026-06-27 03:06 UTCEPSS rescore
  70. 2026-06-25 13:47 UTCEPSS rescore
  71. 2026-06-25 13:47 UTCEPSS rescore
  72. 2026-06-24 14:02 UTCEPSS rescore
  73. 2026-06-24 14:02 UTCEPSS rescore
  74. 2026-06-23 21:30 UTCEPSS rescore
  75. 2026-06-23 21:30 UTCEPSS rescore

Publicly available exploits

(2 references)

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

  • Exploit-DBEDB-45998✓ verified
    First seen Dec 14, 2018

    Safari - Proxy Object Type Confusion (Metasploit)

    Open source ↗
  • Metasploitexploit/osx/browser/safari_proxy_object_type_confusion✓ verified
    First seen Mar 15, 2018

    Safari Proxy Object Type Confusion

    Open source ↗

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2018-4404?
CVE-2018-4404 is a high vulnerability published on January 11, 2019. In iOS before 11.4 and macOS High Sierra before 10.13.5, a memory corruption issue exists and was addressed with improved memory handling.
When was CVE-2018-4404 disclosed?
CVE-2018-4404 was first published on January 11, 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-2018-4404 actively exploited?
CVE-2018-4404 is not currently on CISA's Known Exploited Vulnerabilities catalog. EchelonGraph's EG-KEV model classifies it as weaponized: a functional public exploit exists. FIRST EPSS estimates a 14% probability of exploitation in the next 30 days (96th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2018-4404?
CVE-2018-4404 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2018-4404?
No fix for CVE-2018-4404 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

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