Apple · Multiple Products
CVE-2021-30661
Apple Multiple Products WebKit Storage Use-After-Free Vulnerability
O que é
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..
CISA: Apple iOS, iPadOS, macOS, tvOS, watchOS, and Safari WebKit Storage contain a use-after-free vulnerability that leads to code execution when processing maliciously crafted web content. This vulnerability could impact HTML parsers that use WebKit, including but not limited to Apple Safari and non-Apple products which rely on WebKit for HTML processing.
O que fazer
Apply updates per vendor instructions.
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Mais falhas exploradas de Apple
| Adicionado | Vulnerabilidade | Produto | Gravidade | Chance de ataque |
|---|---|---|---|---|
| 29 de set. de 2026 | Out-of-Bounds Write | Multiple Products | Alto 8,8 | 26% |
| 20 de mar. de 2026 | Buffer Overflow | Multiple Products | Alto 8,8 | 1,7% |
| 20 de mar. de 2026 | Improper Locking | Multiple Products | Alto 7,8 | 0,4% |
| 20 de mar. de 2026 | Classic Buffer Overflow | Multiple Products | Média 5,5 | 0,4% |
| 5 de mar. de 2026 | Integer Overflow or Wraparound | Multiple Products | Alto 8,8 | 7,0% |
| 5 de mar. de 2026 | Use-After-Free | Multiple Products | Alto 8,8 | 4,0% |
| 12 de fev. de 2026 | Multiple Buffer Overflow | Multiple Products | Alto 7,8 | 1,7% |
| 15 de dez. de 2025 | Use-After-Free WebKit | Multiple Products | Alto 8,8 | 26% |
Fontes: Known Exploited Vulnerabilities (CISA, domínio público), CVE records (cve.org) e EPSS (FIRST). A chance de ataque é a estimativa EPSS de que alguém tente explorar a falha nos próximos 30 dias.