CVE-2021-30766

moderate-risk

Published 2021-09-08

An out-of-bounds write was addressed with improved input validation. This issue is fixed in macOS Big Sur 11.5, Security Update 2021-004 Catalina, Security Update 2021-005 Mojave. An application may be able to execute arbitrary code with kernel privileges.

Do I need to act?

0.55% chance of exploitation

EPSS score — low exploit probability

Not on CISA KEV list

No confirmed active exploitation reported to CISA

Patch status unknown

Check vendor advisories for fix availability and mitigation guidance

CVSS 7.8/10 High

LOCAL / LOW complexity

Affected Products (20)

Mac Os X

Affected Vendors

Apple

References (6)

Vendor Advisory https://support.apple.com/en-us/HT212600

Vendor Advisory https://support.apple.com/en-us/HT212602

Vendor Advisory https://support.apple.com/en-us/HT212603

Vendor Advisory https://support.apple.com/en-us/HT212600

Vendor Advisory https://support.apple.com/en-us/HT212602

Vendor Advisory https://support.apple.com/en-us/HT212603

/ 100

moderate-risk

Severity 24/34 · High

Exploitability 2/34 · Minimal

Exposure 23/34 · High