How severe is CVE-2018-4388?

CVE-2018-4388 has a CVSS 3.x base score of 4.6, rated medium severity. It is exploitable over physical access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2018-4388 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (25th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-4388?

CVE-2018-4388 affects Apple Iphone Os. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-4388?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2018-4388 published?

CVE-2018-4388 was published on 2019-04-03 and last updated on 2026-06-17.

CVE-2018-4388

CVE-2018-4388 is a medium-severity vulnerability in Apple Iphone Os with a CVSS 3.x base score of 4.6. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-200.

Key facts

Severity: Medium (CVSS 3.x base score 4.6)
CVSS v2: 2.1
EPSS exploit prediction: 0% (25th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-200
Affected product: Apple Iphone Os
Published: 2019-04-03
Last modified: 2026-06-17

Description

A lock screen issue allowed access to the share function on a locked device. This issue was addressed by restricting options offered on a locked device. This issue affected versions prior to iOS 12.1.

Frequently asked questions

What is CVE-2018-4388?: A lock screen issue allowed access to the share function on a locked device. This issue was addressed by restricting options offered on a locked device. This issue affected versions prior to iOS 12.1.
How severe is CVE-2018-4388?: CVE-2018-4388 has a CVSS 3.x base score of 4.6, rated medium severity. It is exploitable over physical access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2018-4388 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (25th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-4388?: CVE-2018-4388 affects Apple Iphone Os. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-4388?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2018-4388 published?: CVE-2018-4388 was published on 2019-04-03 and last updated on 2026-06-17.

References

https://support.apple.com/kb/HT209192

Affected products (1)

cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*

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