HIGH CISA KEV

CVE-2021-30858

CVSS v3

8.8

HIGH

EPSS Score

0.8%

exploit probability

CISA KEV

Yes

known exploited

Exploitation

—

SSVC status

Description

A use after free issue was addressed with improved memory management. This issue is fixed in iOS 14.8 and iPadOS 14.8, macOS Big Sur 11.6. 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.

CISA Known Exploited Vulnerability

Date Added
11/3/2021
Patch Due Date
11/17/2021
Ransomware Use
Unknown

Technical details

Published
8/24/2021

Frequently asked questions

What is CVE-2021-30858?

A use after free issue was addressed with improved memory management. This issue is fixed in iOS 14.8 and iPadOS 14.8, macOS Big Sur 11.6. 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.

Is CVE-2021-30858 actively exploited?

Yes. CVE-2021-30858 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 11/17/2021.

What is the CVSS score for CVE-2021-30858?

CVE-2021-30858 has a CVSS v3 base score of 8.8 (HIGH severity).

Is CVE-2021-30858 affecting your environment?

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

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