HIGH CISA KEV

CVE-2021-1789

CVSS v3

8.8

HIGH

EPSS Score

0.2%

exploit probability

CISA KEV

Yes

known exploited

Exploitation

—

SSVC status

Description

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.

CISA Known Exploited Vulnerability

Date Added
5/4/2022
Patch Due Date
5/25/2022
Ransomware Use
Unknown

Technical details

Published
4/2/2021

Frequently asked questions

What is CVE-2021-1789?

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.

Is CVE-2021-1789 actively exploited?

Yes. CVE-2021-1789 is on the CISA Known Exploited Vulnerabilities (KEV) catalog, meaning it has been confirmed as actively exploited in the wild. CISA requires federal agencies to patch by 5/25/2022.

What is the CVSS score for CVE-2021-1789?

CVE-2021-1789 has a CVSS v3 base score of 8.8 (HIGH severity).

Is CVE-2021-1789 affecting your environment?

Use isMalicious to check if any of your IPs or domains are associated with this vulnerability's IOCs.

Check an IPSearch CVEs

Other 2021 vulnerabilities worth triaging

Ranked by exploit probability (EPSS).

Back to CVE Database