CVE-2018-4280

HIGHNVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2022-05-14. NVD baseline CVSS 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Elevated
7.8EG
EchelonGraph verdictPlan mitigationSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 2.1%CVSS: 7.8Exploit: 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 memory handling. This issue affected versions prior to iOS 11.4.1, macOS High Sierra 10.13.6, tvOS 11.4.1, watchOS 4.3.2.

CVSS v3
7.8
EG Score
7.8HIGHmedium confidence
EG Risk
56
EG Risk 56/100CISA 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
Severity78% × 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
2.1%
EPSS %ILE
80th
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 (4)

Auto-updated Sep 30, 2026
No fix on record yet.
generic

About the security content of iOS 11.4.1 - Apple Support

https://support.apple.com/kb/HT208938
generic

About the security content of macOS High Sierra 10.13.6, Security Update 2018-004 Sierra, Security Update 2018-004 El Capitan - Apple Support

https://support.apple.com/kb/HT208937
generic

About the security content of tvOS 11.4.1 - Apple Support

https://support.apple.com/kb/HT208936
generic

About the security content of watchOS 4.3.2 - Apple Support

https://support.apple.com/kb/HT208935

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 23× 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 157 total refreshes for this CVE.

  1. 2026-10-05 17:39 UTCEPSS rescore
  2. 2026-10-04 23:18 UTCEPSS rescore
  3. 2026-10-03 14:21 UTCEPSS rescore
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  6. 2026-09-30 10:02 UTCEG score recompute
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  1. 2026-09-02 14:07 UTCEPSS rescore
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  5. 2026-08-28 21:36 UTCEPSS rescore
  6. 2026-08-27 14:21 UTCEPSS rescore
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  21. 2026-08-08 16:32 UTCEPSS rescore
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  24. 2026-08-04 15:05 UTCEPSS rescore
  25. 2026-08-04 10:33 UTCEPSS rescore
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  27. 2026-08-02 02:23 UTCEPSS rescore
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  40. 2026-07-23 01:36 UTCEG score recompute
  41. 2026-07-22 22:16 UTCEG score recompute
  42. 2026-07-22 14:05 UTCEPSS rescore
  43. 2026-07-21 15:22 UTCEPSS rescore
  44. 2026-07-20 17:04 UTCEPSS rescore
  45. 2026-07-20 17:04 UTCEPSS rescore
  46. 2026-07-19 14:28 UTCEPSS rescore
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  48. 2026-07-19 02:26 UTCEPSS rescore
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  50. 2026-07-16 16:59 UTCEPSS rescore
  51. 2026-07-16 16:59 UTCEPSS rescore
  52. 2026-07-15 16:55 UTCEPSS rescore
  53. 2026-07-15 01:56 UTCEPSS rescore
  54. 2026-07-13 22:27 UTCEPSS rescore
  55. 2026-07-13 06:10 UTCEPSS rescore
  56. 2026-07-12 05:43 UTCEPSS rescore
  57. 2026-07-09 19:06 UTCEPSS rescore
  58. 2026-07-08 15:11 UTCEPSS rescore
  59. 2026-07-08 15:11 UTCEPSS rescore
  60. 2026-07-07 13:42 UTCEPSS rescore
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  62. 2026-07-06 16:25 UTCEPSS rescore
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  68. 2026-07-01 15:03 UTCEPSS rescore
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  70. 2026-06-30 23:20 UTCEPSS rescore
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  72. 2026-06-29 14:03 UTCEPSS rescore
  73. 2026-06-28 04:53 UTCEPSS rescore
  74. 2026-06-28 04:53 UTCEPSS rescore
  75. 2026-06-27 03:06 UTCEPSS rescore

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 PoCbazad/blanket
    First seen Feb 23, 2018

    CVE-2018-4280: Mach port replacement vulnerability in launchd on iOS 11.2.6 leading to sandbox escape, privilege escalation, and codesigning bypass.

    Open source ↗
  • GitHub PoCbazad/launchd-portrep
    First seen Jan 22, 2018

    CVE-2018-4280: Mach port replacement vulnerability in launchd on macOS 10.13.5 leading to local privilege escalation and SIP bypass.

    Open source ↗

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2018-4280?
CVE-2018-4280 is a high vulnerability published on April 3, 2019. A memory corruption issue was addressed with improved memory handling. This issue affected versions prior to iOS 11.4.1, macOS High Sierra 10.13.6, tvOS 11.4.1, watchOS 4.3.2.
When was CVE-2018-4280 disclosed?
CVE-2018-4280 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-2018-4280 actively exploited?
CVE-2018-4280 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 2.1% probability of exploitation in the next 30 days (80th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2018-4280?
CVE-2018-4280 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2018-4280?
No fix for CVE-2018-4280 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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