How severe is CVE-2016-4589?

CVE-2016-4589 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2016-4589 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (83rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2016-4589?

CVE-2016-4589 affects Apple Webkit. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2016-4589?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2016-4589 published?

CVE-2016-4589 was published on 2016-07-22 and last updated on 2026-06-17.

CVE-2016-4589

CVE-2016-4589 is a high-severity vulnerability in Apple Webkit with a CVSS 3.x base score of 8.8. 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-119.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 6.8
EPSS exploit prediction: 3% (83rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-119
Affected product: Apple Webkit
Published: 2016-07-22
Last modified: 2026-06-17

Description

WebKit in Apple iOS before 9.3.3, Safari before 9.1.2, and tvOS before 9.2.2 allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via a crafted web site, a different vulnerability than CVE-2016-4622, CVE-2016-4623, and CVE-2016-4624.

Frequently asked questions

What is CVE-2016-4589?: WebKit in Apple iOS before 9.3.3, Safari before 9.1.2, and tvOS before 9.2.2 allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via a crafted web site, a different vulnerability than CVE-2016-4622, CVE-2016-4623, and CVE-2016-4624.
How severe is CVE-2016-4589?: CVE-2016-4589 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2016-4589 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (83rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2016-4589?: CVE-2016-4589 affects Apple Webkit. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2016-4589?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2016-4589 published?: CVE-2016-4589 was published on 2016-07-22 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:apple:webkit:*:*:*:*:*:*:*:*

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