How severe is CVE-2018-4344?

CVE-2018-4344 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2018-4344 being actively exploited?

Yes. CVE-2018-4344 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2022-06-27, which means active exploitation has been confirmed. It should be prioritised for remediation.

What products are affected by CVE-2018-4344?

CVE-2018-4344 primarily affects Apple Iphone Os. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2018-4344?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.

Does CVE-2018-4344 have an EU (EUVD) identifier?

Yes. CVE-2018-4344 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2018-16130. It is also flagged as exploited in the EUVD (since 2022-06-27).

When was CVE-2018-4344 published?

CVE-2018-4344 was published on 2019-04-03 and last updated on 2026-06-17.

CVE-2018-4344

CVE-2018-4344 is a high-severity vulnerability in Apple Iphone Os with a CVSS 3.x base score of 7.8. It is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, confirming it has been exploited in the wild (added 2022-06-27). The underlying weakness is classified as CWE-119.

Key facts

Severity: High (CVSS 3.x base score 7.8)
CVSS v2: 9.3
EPSS exploit prediction: 3% (85th percentile)
Actively exploited: Yes — listed in CISA KEV (added 2022-06-27)
EU (EUVD) id: EUVD-2018-16130
EU exploitation: Flagged exploited in the ENISA EU Vulnerability Database (since 2022-06-27)
Weakness: CWE-119
Affected product: Apple Iphone Os
Published: 2019-04-03
Last modified: 2026-06-17

Description

A memory corruption issue was addressed with improved memory handling. This issue affected versions prior to iOS 12, macOS Mojave 10.14, tvOS 12, watchOS 5.

Frequently asked questions

What is CVE-2018-4344?: A memory corruption issue was addressed with improved memory handling. This issue affected versions prior to iOS 12, macOS Mojave 10.14, tvOS 12, watchOS 5.
How severe is CVE-2018-4344?: CVE-2018-4344 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2018-4344 being actively exploited?: Yes. CVE-2018-4344 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2022-06-27, which means active exploitation has been confirmed. It should be prioritised for remediation.
What products are affected by CVE-2018-4344?: CVE-2018-4344 primarily affects Apple Iphone Os. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2018-4344?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.
Does CVE-2018-4344 have an EU (EUVD) identifier?: Yes. CVE-2018-4344 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2018-16130. It is also flagged as exploited in the EUVD (since 2022-06-27).
When was CVE-2018-4344 published?: CVE-2018-4344 was published on 2019-04-03 and last updated on 2026-06-17.

References

Affected products (4)

cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*
cpe:2.3:o:apple:mac_os_x:*:*:*:*:*:*:*:*
cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:*
cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:*

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