# CVE-2021-30661

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..

- Page: https://www.vulneraibility.com/cve/CVE-2021-30661
- CVSS: 8.8
- Known exploited: yes, in CISA KEV since 2021-11-03; CISA due date 2021-11-17
- EPSS: 4.49% (percentile 91.6)
- CISA SSVC: exploitation active, automatable no, technical impact total (assessed 2025-01-29)
- Weakness: CWE-416
- Published: 2021-09-08

## Affected versions

- Apple iOS and iPadOS: affected < 14.5
- Apple macOS: affected < 11.3; < 12.5
- Apple Safari: affected < 14.1
- Apple tvOS: affected < 14.5
- Apple watchOS: affected < 7.4

A version outside these ranges is not a statement that it is unaffected.

## References

- [other] https://support.apple.com/en-us/HT212317
- [other] https://support.apple.com/en-us/HT212323
- [other] https://support.apple.com/en-us/HT212324
- [other] https://support.apple.com/en-us/HT212325
- [other] https://support.apple.com/en-us/HT212341
- [other] https://support.apple.com/en-us/HT212318
- [other] https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-30661

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Summary, impact and action are written by the vulneraibility.com AI analysis pipeline from the CVE record, NVD, CISA and FIRST data; verify against the references.