CVE-2021-1789: Apple iOS and iPadOS

Type confusion in Apple iOS and iPadOS and others

CVSS 8.8 HighCriticalIn CISA KEVEPSS 0.14 · 96th percentile

Critical, because:

In CISA’s KEV catalogue since 4 May 2022: it is known to be exploited.
CVSS score 8.8 (7.0 or more) and EPSS 0.14 (0.1 or more): a high score and a real chance of exploitation in the next 30 days.

Published by the CVE Program (CNA: apple) at 2 Apr 2021, 18:01 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
Vendor	Product	Versions
Apple	iOS and iPadOS	affected unspecified to before 14.4 custom
Apple	macOS	affected unspecified to before 11.2 custom
Apple	macOS	affected unspecified to before 7.3 custom
Apple	macOS	affected unspecified to before 14.4 custom
Apple	macOS	affected unspecified to before 14.0 custom

Identifiers

CVE-2021-1789

CNA

apple

Weakness (CWE)

CWE-843

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
8.8	High	3.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H	ADP (CISA-ADP)

CISA KEV Listed since 4 May 2022: known to be exploited.
EPSS 0.14, the 96th percentile, on 15 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the CVE Program, published 2 Apr 2021. New records show when each source confirmed them.

Sources

References from the CNA

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.