CVE-2021-30661
Apple iOS and iPadOS, Apple Safari, Apple tvOS
Published 8 Sept 2021 · updated 17 Jun 2026 · Analyzed
8.8 High · CVSS 3.1, NVD
Exploited in the wild
CISA added this to its Known Exploited Vulnerabilities catalog on 3 Nov 2021, with a remediation deadline of 17 Nov 2021 for US federal agencies.
Required action: Apply updates per vendor instructions.
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..
References
- support.apple.com/en-us/HT212317 · Vendor Advisory
- support.apple.com/en-us/HT212318 · Vendor Advisory
- support.apple.com/en-us/HT212323 · Vendor Advisory
- support.apple.com/en-us/HT212324 · Vendor Advisory
- support.apple.com/en-us/HT212325 · Vendor Advisory
- support.apple.com/en-us/HT212341 · Vendor Advisory
- www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-30661 · Third Party Advisory, US Government Resource