HIGH
CVE-2021-30661
CVSS
8.8
KEV
Description
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..
Summary dbcve.org
Use-after-free vulnerability in WebKit allowing arbitrary code execution via maliciously crafted web content. Affects Safari and multiple Apple operating systems. Actively exploited in the wild.
Mitigation
Apply vendor patches: update to iOS 14.5+/iPadOS 14.5+/watchOS 7.4+/tvOS 14.5+/macOS Big Sur 11.3+/Safari 14.1+, or iOS 12.5.3 for legacy devices.
Weakness (CWE)
CWE-416
Use After Free
EPSS Score
4.49%
Probability of exploitation in next 30 days
91.1th percentile
References
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://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-30661
Third Party Advisory, US Government Resource
Base CVE data derived from NVD (public domain). Enrichment by
dbcve.org
(CC-BY-4.0). Fetched via API.