How severe is CVE-2018-4123?

CVE-2018-4123 has a CVSS 3.x base score of 2.4, rated low severity. It is exploitable over physical access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2018-4123 being actively exploited?

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

What products are affected by CVE-2018-4123?

CVE-2018-4123 affects Apple Iphone Os. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-4123?

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

When was CVE-2018-4123 published?

CVE-2018-4123 was published on 2018-04-03 and last updated on 2026-06-17.

CVE-2018-4123

CVE-2018-4123 is a low-severity vulnerability in Apple Iphone Os with a CVSS 3.x base score of 2.4. 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: Low (CVSS 3.x base score 2.4)
CVSS v2: 2.1
EPSS exploit prediction: 0% (30th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-200
Affected product: Apple Iphone Os
Published: 2018-04-03
Last modified: 2026-06-17

Description

An issue was discovered in certain Apple products. iOS before 11.3 is affected. The issue involves alarm and timer handling in the "Clock" component. It allows physically proximate attackers to discover the iTunes e-mail address.

Frequently asked questions

What is CVE-2018-4123?: An issue was discovered in certain Apple products. iOS before 11.3 is affected. The issue involves alarm and timer handling in the "Clock" component. It allows physically proximate attackers to discover the iTunes e-mail address.
How severe is CVE-2018-4123?: CVE-2018-4123 has a CVSS 3.x base score of 2.4, rated low severity. It is exploitable over physical access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2018-4123 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (30th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-4123?: CVE-2018-4123 affects Apple Iphone Os. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-4123?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2018-4123 published?: CVE-2018-4123 was published on 2018-04-03 and last updated on 2026-06-17.

References

Affected products (1)

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

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