CVE-2021-1789

mediumpriority · act · 90OT risk · criticalKEV · exploitedEPSS 0.140 · 97 %ileEURUUS

grimoire priorityP0 · Act now

Exploitable?

Yes · in the wild

CISA KEV

Likely / severe?

14.0% (97th) EPSS

CVSS 6.8 · medium

Is it mine?

50 products

Check your exposure

Who says so?

3 sources

cnnvd · enisa_euvd · fstec_bdu

added 2022-05-04remediate by 2022-05-25

required action Apply updates per vendor instructions.

EPSS · scored 2026-10-27

Apple Multiple Products Type Confusion Vulnerability

A type confusion issue was addressed with improved state handling. This issue is fixed in macOS Big Sur 11.2, Security Update 2021-001 Catalina, Security Update 2021-001 Mojave, tvOS 14.4, watchOS 7.3, iOS 14.4 and iPadOS 14.4, Safari 14.0.3. Processing maliciously crafted web content may lead to arbitrary code execution.

cvss

Technical severity, 0–10. One row per scoring source.

8.8

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.8–8.8

v2.06.8mediumAV:N/AC:M/Au:N/C:P/I:P/A:Pprimary · NVD / NIST USexploitability 8.6 · impact 6.4

v3.18.8highCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 2.8 · impact 5.9

v3.18.8highAV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:Hsecondary · FSTEC (BDU) RU

v3.18.8highCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:Hsecondary · ENISA EU

v3.18.8highCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:Hsecondaryexploitability 2.8 · impact 5.9

v3.18.8highCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:Hsecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: active · Automatable: no · Technical Impact: totalcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-843USprimaryCWE-843US

affected products (50)

Products and version ranges known to be affected.

Apple iOS and iPadOSunspecified → 14.4enisa_euvdEU
Apple macOSunspecified → 11.2enisa_euvdEU
Apple macOSunspecified → 14.0enisa_euvdEU
Apple macOSunspecified → 14.4enisa_euvdEU
Apple macOSunspecified → 7.3enisa_euvdEU
Apple Inc. MacOS≤ Security Update 2021-001 Mojavefstec_bduRU
Apple Inc. MacOS≤ Security Update 2021-001fstec_bduRU
Apple Inc. MacOS≤ 11.2fstec_bduRU
Apple Inc. Safari≤ 14.0.3fstec_bduRU
Apple Inc. iOS≤ 14.4fstec_bduRU
Apple Inc. iPadOS≤ 14.4fstec_bduRU
Apple Inc. tvOS≤ 14.4fstec_bduRU
Apple Inc. watchOS≤ 7.3fstec_bduRU
Canonical Ltd. Ubuntu≤ 20.04 LTSfstec_bduRU
Canonical Ltd. Ubuntu≤ 18.04 LTSfstec_bduRU
Canonical Ltd. Ubuntu≤ 20.10fstec_bduRU
Fedora Project Fedora≤ 32fstec_bduRU
Fedora Project Fedora≤ 34fstec_bduRU
Fedora Project Fedora≤ 33fstec_bduRU
Novell Inc. OpenSUSE Leap≤ 15.2fstec_bduRU

showing 20 of 50

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu NVD CVE.org MITRE

published 2021-04-02modified 2026-06-17

related (1,197)

Related entries.

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Access of resource using incompatible type ('type confusion') in Desktop Window Manager allows an authorized attacker to elevate privileges locally.
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Type Confusion in V8 in Google Chrome prior to 142.0.7444.175 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page. (Chromium security severity:…
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Type confusion in V8 in Google Chrome prior to 140.0.7339.185 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page. (Chromium security severity:…
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+1192 more

references (40)

External citations — patches, advisories, analysis.

scry

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