CVE-2021-30661

high-risk
Published 2021-09-08

A use after free issue was addressed with improved memory management. This issue is fixed in Safari 14.1, iOS 12.5.3, iOS 14.5 and iPadOS 14.5, watchOS 7.4, tvOS 14.5, macOS Big Sur 11.3. 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..

Do I need to act?

-
0.15% chance of exploitation
EPSS score — low exploit probability
!
CISA KEV: actively exploited in the wild
On the Known Exploited Vulnerabilities catalog — federal agencies must patch
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
8
CVSS 8.8/10 High
NETWORK / LOW complexity

Affected Products (6)

Affected Vendors

Apple

References (13)

Vendor Advisory https://support.apple.com/en-us/HT212317
Vendor Advisory https://support.apple.com/en-us/HT212318
Vendor Advisory https://support.apple.com/en-us/HT212323
Vendor Advisory https://support.apple.com/en-us/HT212324
Vendor Advisory https://support.apple.com/en-us/HT212325
Vendor Advisory https://support.apple.com/en-us/HT212341
Vendor Advisory https://support.apple.com/en-us/HT212317
Vendor Advisory https://support.apple.com/en-us/HT212318
Vendor Advisory https://support.apple.com/en-us/HT212323
Vendor Advisory https://support.apple.com/en-us/HT212324
Vendor Advisory https://support.apple.com/en-us/HT212325
Vendor Advisory https://support.apple.com/en-us/HT212341
Third Party Advisory https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-...
51
/ 100
high-risk
Severity 30/34 · Critical
Exploitability 8/34 · Low
Exposure 13/34 · Low