CVE-2021-1818

high-risk
Published 2021-04-02

A logic issue was addressed with improved state management. This issue is fixed in macOS Big Sur 11.2, Security Update 2021-001 Catalina, Security Update 2021-001 Mojave, watchOS 7.3, tvOS 14.4, iOS 14.4 and iPadOS 14.4. A remote attacker may be able to cause unexpected application termination or arbitrary code execution.

Do I need to act?

~
1.7% chance of exploitation in next 30 days
EPSS score — moderate 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
9
CVSS 9.8/10 Critical
NETWORK / LOW complexity

Affected Products (20)

Affected Vendors

Apple

References (8)

Vendor Advisory https://support.apple.com/en-us/HT212146
Vendor Advisory https://support.apple.com/en-us/HT212147
Vendor Advisory https://support.apple.com/en-us/HT212148
Vendor Advisory https://support.apple.com/en-us/HT212149
Vendor Advisory https://support.apple.com/en-us/HT212146
Vendor Advisory https://support.apple.com/en-us/HT212147
Vendor Advisory https://support.apple.com/en-us/HT212148
Vendor Advisory https://support.apple.com/en-us/HT212149
57
/ 100
high-risk
Severity 32/34 · Critical
Exploitability 5/34 · Minimal
Exposure 20/34 · Moderate