How severe is CVE-2019-8506?

CVE-2019-8506 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-2019-8506 being actively exploited?

Yes. CVE-2019-8506 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2022-05-04, which means active exploitation has been confirmed. It should be prioritised for remediation.

What products are affected by CVE-2019-8506?

CVE-2019-8506 primarily affects Apple Icloud. In total, 9 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2019-8506?

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-2019-8506 have an EU (EUVD) identifier?

Yes. CVE-2019-8506 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2019-17896. It is also flagged as exploited in the EUVD (since 2022-05-04).

When was CVE-2019-8506 published?

CVE-2019-8506 was published on 2019-12-18 and last updated on 2026-06-17.

CVE-2019-8506

CVE-2019-8506 is a high-severity vulnerability in Apple Icloud with a CVSS 3.x base score of 8.8. It is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, confirming it has been exploited in the wild (added 2022-05-04). The underlying weakness is classified as CWE-843.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 9.3
EPSS exploit prediction: 18% (97th percentile)
Actively exploited: Yes — listed in CISA KEV (added 2022-05-04)
EU (EUVD) id: EUVD-2019-17896
EU exploitation: Flagged exploited in the ENISA EU Vulnerability Database (since 2022-05-04)
Weakness: CWE-843
Affected product: Apple Icloud
Published: 2019-12-18
Last modified: 2026-06-17

Description

A type confusion issue was 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-2019-8506?: A type confusion issue was 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-2019-8506?: CVE-2019-8506 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-2019-8506 being actively exploited?: Yes. CVE-2019-8506 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2022-05-04, which means active exploitation has been confirmed. It should be prioritised for remediation.
What products are affected by CVE-2019-8506?: CVE-2019-8506 primarily affects Apple Icloud. In total, 9 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2019-8506?: 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-2019-8506 have an EU (EUVD) identifier?: Yes. CVE-2019-8506 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2019-17896. It is also flagged as exploited in the EUVD (since 2022-05-04).
When was CVE-2019-8506 published?: CVE-2019-8506 was published on 2019-12-18 and last updated on 2026-06-17.

References

Affected products (9)

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:*:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:*

More vulnerabilities in Apple Icloud

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Other CWE-843 vulnerabilities

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CVE-2023-22579 — Critical (CVSS 9.9): Due to improper parameter filtering in the sequalize js library, can a attacker peform injection.
CVE-2026-13776 — Critical (CVSS 9.8): Type Confusion in Dawn in Google Chrome prior to 150.0.7871.47 allowed a remote attacker who had compromised the…
CVE-2026-43038 — Critical (CVSS 9.8): In the Linux kernel, the following vulnerability has been resolved: ipv6: icmp: clear skb2->cb[] in…
CVE-2025-70023 — Critical (CVSS 9.8): An issue pertaining to CWE-843: Access of Resource Using Incompatible Type was discovered in transloadit uppy v0.25.6.

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