CVE-2019-8506

Exp

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.

Published: 2019-12-18 Last update: 2025-10-23 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2019-8506 is rated Critical Active Threat (92.4/100): CVSS High severity, with high exploitation likelihood (EPSS 8.02%, 92th percentile). CISA KEV confirms active exploitation (added 2022-05-04) affecting Apple / Multiple Products. a weakness (CWE-843) Unauthenticated remote administrative access may be possible. The CISA remediation deadline has passed—treat as an emergency patch priority.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

CISA KEV Record for CVE-2019-8506

Name: Apple Multiple Products Type Confusion Vulnerability · CISA KEV detail

Exploit added: 2022-05-04

Action due: 2022-05-25

Required action: Apply updates per vendor instructions.

Public exploit references (Exploit-DB) for CVE-2019-8506

EDB-ID Source Kind Published Link
46647 exploit_db edb 2019-04-03 Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2019-8506

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-05-31 8.06% 8.02% -0.04%
2 2026-03-31 7.68% 8.06% +0.38%
3 2026-01-18 — 7.68% —

Full EPSS history (38 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2019-8506

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
8.8 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.8 5.9 [email protected]
8.8 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.8 5.9 134c704f-9b21-4f2e-91b3-4a467353bcc0
9.3 2.0 HIGH
AV:N/AC:M/Au:N/C:C/I:C/A:C Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:C)
Complete confidentiality impact.
Integrity impact (I:C)
Complete integrity impact.
Availability impact (A:C)
Complete availability impact.
 8.6 10.0 [email protected]

Weakness enumeration for CVE-2019-8506

OS Trackers for CVE-2019-8506

vendor priority summary link
alpine — CVE-2019-8506: 1 source package rows (webkit2gtk); 5 state rows across 5 repos (3.17-community, 3.18-community, 3.19-community, 3.20-community, edge-community); fixed 5, open 0. https://security.alpinelinux.org/vuln/CVE-2019-8506
debian not yet assigned CVE-2019-8506 not yet assigned priority: Debian including 1 source packages (webkit2gtk), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2019-8506
gentoo normal CVE-2019-8506: 1 GLSA(s) (201909-05), 1 atom(s) (net-libs/webkit-gtk); latest impact normal. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2019-8506
redhat medium — https://access.redhat.com/security/cve/CVE-2019-8506
ubuntu medium CVE-2019-8506 medium priority: Ubuntu including 5 source packages (qtwebkit, qtwebkit-opensource-src, qtwebkit-source, webkit2gtk, webkitgtk), 79 status rows across 16 suites (bionic, cosmic, disco, eoan, focal, groovy, hirsute, impish, jammy, kinetic, lunar, mantic, noble, trusty, upstream, xenial): DNE 38, ignored 24, not-affected 11, needs-triage 3, released 3. https://ubuntu.com/security/CVE-2019-8506

Affected software / configurations for CVE-2019-8506

Vendor Product Version Raw CPE
apple icloud < 7.11 cpe:2.3:a:apple:icloud:*:*:*:*:*:windows:*:*
apple itunes < 12.9.4 cpe:2.3:a:apple:itunes:*:*:*:*:*:windows:*:*
apple safari < 12.1 cpe:2.3:a:apple:safari:*:*:*:*:*:*:*:*
apple iphone_os < 12.2 cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*
apple tvos < 12.2 cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:*
apple watchos < 5.2 cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:*
redhat enterprise_linux_desktop 7.0 cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:*
redhat enterprise_linux_server 7.0 cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:*
redhat enterprise_linux_workstation 7.0 cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:*

References for CVE-2019-8506

URL Tags
https://support.apple.com/HT209599 Release Notes Vendor Advisory
https://support.apple.com/HT209601 Release Notes Vendor Advisory
https://support.apple.com/HT209602 Release Notes Vendor Advisory
https://support.apple.com/HT209603 Release Notes Vendor Advisory
https://support.apple.com/HT209604 Release Notes Vendor Advisory
https://support.apple.com/HT209605 Release Notes Vendor Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2019-8506 US Government Resource
cvelogic Threat Intelligence