CVE-2021-1840

moderate-risk

Published 2021-09-08

A memory corruption issue was addressed with improved validation. This issue is fixed in macOS Big Sur 11.3, Security Update 2021-002 Catalina, Security Update 2021-003 Mojave. A local attacker may be able to elevate their privileges.

Do I need to act?

0.07% 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/HT212325

Vendor Advisory https://support.apple.com/en-us/HT212326

Vendor Advisory https://support.apple.com/en-us/HT212327

Vendor Advisory https://support.apple.com/en-us/HT212325

Vendor Advisory https://support.apple.com/en-us/HT212326

Vendor Advisory https://support.apple.com/en-us/HT212327

/ 100

moderate-risk

Severity 24/34 · High

Exploitability 0/34 · Minimal

Exposure 24/34 · High