How severe is CVE-2019-8518?

CVE-2019-8518 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-2019-8518 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 10% (95th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-8518?

CVE-2019-8518 primarily affects Apple Icloud. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2019-8518?

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-2019-8518 published?

CVE-2019-8518 was published on 2019-12-18 and last updated on 2026-06-17.

CVE-2019-8518

CVE-2019-8518 is a high-severity vulnerability in Apple Icloud with a CVSS 3.x base score of 8.8. Its EPSS exploit-prediction score of 10% places it in the 95th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-787.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 9.3
EPSS exploit prediction: 10% (95th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-787
Affected product: Apple Icloud
Published: 2019-12-18
Last modified: 2026-06-17

Description

Multiple memory corruption issues were addressed with improved memory handling. This issue is fixed in iOS 12.2, tvOS 12.2, watchOS 5.2, Safari 12.1, iTunes 12.9.4 for Windows, iCloud for Windows 7.11. Processing maliciously crafted web content may lead to arbitrary code execution.

Frequently asked questions

What is CVE-2019-8518?: Multiple memory corruption issues were addressed with improved memory handling. This issue is fixed in iOS 12.2, tvOS 12.2, watchOS 5.2, Safari 12.1, iTunes 12.9.4 for Windows, iCloud for Windows 7.11. Processing maliciously crafted web content may lead to arbitrary code execution.
How severe is CVE-2019-8518?: CVE-2019-8518 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-2019-8518 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 10% (95th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-8518?: CVE-2019-8518 primarily affects Apple Icloud. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2019-8518?: 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-2019-8518 published?: CVE-2019-8518 was published on 2019-12-18 and last updated on 2026-06-17.

References

Affected products (6)

cpe:2.3:a:apple:icloud:*:*:*:*:*:windows:*:*
cpe:2.3:a:apple:itunes:*:*:*:*:*:windows:*:*
cpe:2.3:a:apple:safari:*:*:*:*:*:*:*:*
cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*
cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:*
cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:*

More vulnerabilities in Apple Icloud

CVE-2019-8756 — Critical (CVSS 9.8): Multiple memory corruption issues were addressed with improved input validation. This issue is fixed in macOS Catalina…
CVE-2019-8749 — Critical (CVSS 9.8): Multiple memory corruption issues were addressed with improved input validation. This issue is fixed in macOS Catalina…
CVE-2019-8746 — Critical (CVSS 9.8): An out-of-bounds read was addressed with improved input validation. This issue is fixed in macOS Catalina 10.15, iOS…
CVE-2020-9895 — Critical (CVSS 9.8): A use after free issue was addressed with improved memory management. This issue is fixed in iOS 13.6 and iPadOS 13.6,…
CVE-2020-9850 — Critical (CVSS 9.8): A logic issue was addressed with improved restrictions. This issue is fixed in iOS 13.5 and iPadOS 13.5, tvOS 13.4.5,…
CVE-2020-3911 — Critical (CVSS 9.8): A buffer overflow was addressed with improved bounds checking. This issue is fixed in iOS 13.4 and iPadOS 13.4, macOS…

All CVEs affecting Apple Icloud →

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