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Vulnerability details: VCID-xtjm-q8bt-k3c3
Vulnerability ID VCID-xtjm-q8bt-k3c3
Aliases CVE-2019-8558
Summary 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.
Status Published
Exploitability 2.0
Weighted Severity 7.9
Risk 10.0
Affected and Fixed Packages Package Details
Weaknesses (2)
CWE-787 Out-of-bounds Write
CWE-94 Improper Control of Generation of Code ('Code Injection')
System Score Found at
cvssv3 6.3 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2019-8558.json
epss 0.15256 https://api.first.org/data/v1/epss?cve=CVE-2019-8558
epss 0.15256 https://api.first.org/data/v1/epss?cve=CVE-2019-8558
epss 0.15256 https://api.first.org/data/v1/epss?cve=CVE-2019-8558
epss 0.15256 https://api.first.org/data/v1/epss?cve=CVE-2019-8558
epss 0.15256 https://api.first.org/data/v1/epss?cve=CVE-2019-8558
epss 0.15256 https://api.first.org/data/v1/epss?cve=CVE-2019-8558
epss 0.15256 https://api.first.org/data/v1/epss?cve=CVE-2019-8558
epss 0.15256 https://api.first.org/data/v1/epss?cve=CVE-2019-8558
epss 0.15256 https://api.first.org/data/v1/epss?cve=CVE-2019-8558
epss 0.15256 https://api.first.org/data/v1/epss?cve=CVE-2019-8558
epss 0.15256 https://api.first.org/data/v1/epss?cve=CVE-2019-8558
epss 0.15256 https://api.first.org/data/v1/epss?cve=CVE-2019-8558
epss 0.15256 https://api.first.org/data/v1/epss?cve=CVE-2019-8558
epss 0.15256 https://api.first.org/data/v1/epss?cve=CVE-2019-8558
cvssv2 6.8 https://nvd.nist.gov/vuln/detail/CVE-2019-8558
cvssv3.1 8.8 https://nvd.nist.gov/vuln/detail/CVE-2019-8558
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2019-8558.json
https://api.first.org/data/v1/epss?cve=CVE-2019-8558
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-8558
1719231 https://bugzilla.redhat.com/show_bug.cgi?id=1719231
cpe:2.3:a:apple:icloud:*:*:*:*:*:windows:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:apple:icloud:*:*:*:*:*:windows:*:*
cpe:2.3:a:apple:itunes:*:*:*:*:*:windows:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:apple:itunes:*:*:*:*:*:windows:*:*
cpe:2.3:a:apple:safari:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:apple:safari:*:*:*:*:*:*:*:*
cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*
cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:*
cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:*
CVE-2019-8558 Exploit https://bugs.chromium.org/p/project-zero/issues/detail?id=1783
CVE-2019-8558 Exploit https://gitlab.com/exploit-database/exploitdb/-/blob/main/exploits/multiple/dos/46650.js
CVE-2019-8558 https://nvd.nist.gov/vuln/detail/CVE-2019-8558
RHSA-2019:3553 https://access.redhat.com/errata/RHSA-2019:3553
RHSA-2020:4035 https://access.redhat.com/errata/RHSA-2020:4035
USN-3948-1 https://usn.ubuntu.com/3948-1/
Data source Exploit-DB
Date added April 3, 2019
Description WebKit JavaScriptCore - CodeBlock Dangling Watchpoints Use-After-Free
Ransomware campaign use Known
Source publication date April 3, 2019
Exploit type dos
Platform multiple
Source update date April 3, 2019
Source URL https://bugs.chromium.org/p/project-zero/issues/detail?id=1783
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2019-8558.json
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: AV:N/AC:M/Au:N/C:P/I:P/A:P Found at https://nvd.nist.gov/vuln/detail/CVE-2019-8558
Exploitability (E) Access Vector (AV) Access Complexity (AC) Authentication (Au) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

high

functional

unproven

proof_of_concept

not_defined

local

adjacent_network

network

high

medium

low

multiple

single

none

none

partial

complete

none

partial

complete

none

partial

complete
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2019-8558
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.94316
EPSS Score 0.15256
Published At Aug. 11, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-31T08:36:31.474038+00:00 Ubuntu USN Importer Import https://usn.ubuntu.com/3948-1/ 37.0.0