CVE-2018-4390 — An inconsistent user interface issue was addressed with improved state management

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MEDIUM

An inconsistent user interface issue was addressed with improved state management

Published Oct 27, 2020

5.5

MEDIUM

CVSS 3.1

EPSS 0.87%

Description

An inconsistent user interface issue was addressed with improved state management. This issue is fixed in macOS High Sierra 10.13.1, Security Update 2017-001 Sierra, and Security Update 2017-004 El Capitan, watchOS 4.3, iOS 12.1. Processing a maliciously crafted text message may lead to UI spoofing.

Affected products

Vendor Apple Product macOS Default
n/a
- Version
  unspecified
  Status
  affected
  Constraints
  <10.13
- Version
  unspecified
  Status
  affected
  Constraints
  <12.1
- Version
  unspecified
  Status
  affected
  Constraints
  <4.3

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor

Product

Default status

Versions

Apple

macOS

n/a

Version	Status	Constraints
unspecified	affected	<10.13
unspecified	affected	<12.1
unspecified	affected	<4.3

Remediation

No remediation recorded yet.

Metrics

0.87% 0.00866

Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 3, 2026.

EPSS probability 0.00866

Score over time

2021–2026

EPSS v1
EPSS v5
EPSS v2
EPSS v3

Percentile over time

EPSS v1
EPSS v5
EPSS v2
EPSS v3

Table of values (9 key points)

Flat stretches are collapsed; showing up to 120 newest points.

Date	Score	Percentile	Model
Oct 3, 2026	0.87% (0.00866)	57.25th	v5 (v2026.06.15)
Sep 20, 2026	0.87% (0.00866)	57.11th	v5 (v2026.06.15)
Jul 20, 2024	0.09% (0.00091)	39.56th	v3 (v2023.03.01)
Sep 3, 2023	0.09% (0.00091)	38.26th	v3 (v2023.03.01)
Mar 7, 2023	0.06% (0.00059)	22.72th	v3 (v2023.03.01)
Mar 6, 2023	0.95% (0.00954)	36.37th	v2 (v2022.01.01)
Feb 4, 2022	0.95% (0.00954)	16.28th	v2 (v2022.01.01)
Feb 3, 2022	0.12% (0.00123)	0.41th	v5 (v2026.06.15)
Apr 14, 2021	0.12% (0.00123)	0.00th	v1

Weaknesses (0)

No CWE recorded.

References (3)

https://support.apple.com/en-us/HT208221
x_refsource_MISCVendor Advisory
https://support.apple.com/en-us/HT208696
x_refsource_MISCVendor Advisory
https://support.apple.com/en-us/HT209192
x_refsource_MISCVendor Advisory

Link	Providers	Tags
https://support.apple.com/en-us/HT208221		x_refsource_MISCVendor Advisory
https://support.apple.com/en-us/HT208696		x_refsource_MISCVendor Advisory
https://support.apple.com/en-us/HT209192		x_refsource_MISCVendor Advisory

Change history (0)

No recorded changes yet.

Sources

CVE.org / MITRE

Status PUBLISHED

Assigner apple

Published Oct 27, 2020

Updated Aug 5, 2024

Reserved Jan 2, 2018

Link CVE-2018-4390

CISA Vulnrichment

Updated n/a

NVD

Status Modified

Modified Jun 17, 2026

Link CVE-2018-4390

Red Hat

Severity n/a

Public date n/a

Links CVE-2018-4390