CVE-2021-30661 KEV
8.8
HIGH · CVSS 3.1 · EPSS 4.5% (pctl 91)
Patch first
On CISA KEV — known exploited in the wild, due 2021-11-17.
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..
Scoring
| CVSS | 8.8 (HIGH, v3.1) |
|---|---|
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
| EPSS | 4.49% — more likely to be exploited than 91% of all CVEs |
| Weakness | CWE-416 |
| On CISA KEV | yes — remediate by 2021-11-17 |
| Public exploit | none known |
| Published | 2021-09-08 |
| Last modified | 2026-06-17 |
CISA KEV
| Name | Apple Multiple Products WebKit Storage Use-After-Free Vulnerability |
|---|---|
| Added | 2021-11-03 |
| Due | 2021-11-17 |
| Vendor / product | Apple / Multiple Products |
| Ransomware use | none reported |
Affected (6)
| Vendor | Product |
|---|---|
| apple | ipados |
| apple | iphone os |
| apple | macos |
| apple | safari |
| apple | tvos |
| apple | watchos |
References
- https://support.apple.com/en-us/HT212317
- https://support.apple.com/en-us/HT212318
- https://support.apple.com/en-us/HT212323
- https://support.apple.com/en-us/HT212324
- https://support.apple.com/en-us/HT212325
- https://support.apple.com/en-us/HT212341
- https://support.apple.com/en-us/HT212317
- https://support.apple.com/en-us/HT212318
- https://support.apple.com/en-us/HT212323
- https://support.apple.com/en-us/HT212324
- https://support.apple.com/en-us/HT212325
- https://support.apple.com/en-us/HT212341
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-30661
→ the Explorer · watch your stack · NVD