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Vulnerability details: VCID-bq7y-u87y-aaas
Vulnerability ID VCID-bq7y-u87y-aaas
Aliases CVE-2021-30762
Summary A use after free issue was addressed with improved memory management. This issue is fixed in iOS 12.5.4. Processing maliciously crafted web content may lead to arbitrary code execution. Apple is aware of a report that this issue may have been actively exploited..
Status Published
Exploitability 2.0
Weighted Severity 8.0
Risk 10.0
Affected and Fixed Packages Package Details
Weaknesses (2)
CWE-416 Use After Free
CWE-20 Improper Input Validation
System Score Found at
generic_textual Medium http://people.canonical.com/~ubuntu-security/cve/2021/CVE-2021-30762.html
rhas Moderate https://access.redhat.com/errata/RHSA-2020:4035
rhas Moderate https://access.redhat.com/errata/RHSA-2020:4451
cvssv3 8.8 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-30762.json
epss 0.00097 https://api.first.org/data/v1/epss?cve=CVE-2021-30762
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epss 0.00097 https://api.first.org/data/v1/epss?cve=CVE-2021-30762
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epss 0.00153 https://api.first.org/data/v1/epss?cve=CVE-2021-30762
epss 0.00579 https://api.first.org/data/v1/epss?cve=CVE-2021-30762
epss 0.00579 https://api.first.org/data/v1/epss?cve=CVE-2021-30762
epss 0.00579 https://api.first.org/data/v1/epss?cve=CVE-2021-30762
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epss 0.00579 https://api.first.org/data/v1/epss?cve=CVE-2021-30762
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rhbs medium https://bugzilla.redhat.com/show_bug.cgi?id=1986898
generic_textual Medium https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-3885
generic_textual Medium https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-3894
generic_textual Medium https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-3895
generic_textual Medium https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-3897
generic_textual Medium https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-3899
generic_textual Medium https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-3900
generic_textual Medium https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-3901
generic_textual Medium https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-3902
generic_textual Medium https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-30762
cvssv2 6.8 https://nvd.nist.gov/vuln/detail/CVE-2021-30762
cvssv3 8.8 https://nvd.nist.gov/vuln/detail/CVE-2021-30762
cvssv3.1 8.8 https://nvd.nist.gov/vuln/detail/CVE-2021-30762
archlinux High https://security.archlinux.org/AVG-2212
archlinux High https://security.archlinux.org/AVG-2213
cvssv3.1 8.8 https://support.apple.com/en-us/HT212548
ssvc Attend https://support.apple.com/en-us/HT212548
Reference id Reference type URL
http://people.canonical.com/~ubuntu-security/cve/2021/CVE-2021-30762.html
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-30762.json
https://api.first.org/data/v1/epss?cve=CVE-2021-30762
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-3885
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-3894
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-3895
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-3897
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-3899
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-3900
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-3901
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-3902
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-30762
https://support.apple.com/en-us/HT212548
1986898 https://bugzilla.redhat.com/show_bug.cgi?id=1986898
AVG-2212 https://security.archlinux.org/AVG-2212
AVG-2213 https://security.archlinux.org/AVG-2213
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:*:*:*:*:*:*:*:*
CVE-2021-30762 https://nvd.nist.gov/vuln/detail/CVE-2021-30762
GLSA-202202-01 https://security.gentoo.org/glsa/202202-01
RHSA-2020:4035 https://access.redhat.com/errata/RHSA-2020:4035
RHSA-2020:4451 https://access.redhat.com/errata/RHSA-2020:4451
Data source KEV
Date added Nov. 3, 2021
Description Apple iOS WebKit contains a use-after-free vulnerability that leads to code execution when processing maliciously crafted web content. This vulnerability could impact HTML parsers that use WebKit, including but not limited to Apple Safari and non-Apple products which rely on WebKit for HTML processing.
Required action Apply updates per vendor instructions.
Due date Nov. 17, 2021
Note 
https://nvd.nist.gov/vuln/detail/CVE-2021-30762
Ransomware campaign use Unknown
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-30762.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-2021-30762
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-2021-30762
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: 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-2021-30762
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: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://support.apple.com/en-us/HT212548
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: SSVCv2/E:A/A:N/T:T/P:M/B:A/M:M/D:A/2025-01-29T17:27:21Z/ Found at https://support.apple.com/en-us/HT212548
Exploit Prediction Scoring System (EPSS)
Percentile 0.24315
EPSS Score 0.00097
Published At March 28, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
There are no relevant records.