CVE-2021-30666
Apple iOS WebKit Buffer Overflow Vulnerability
8.8
HIGH
CVSS 3.1
⚠ KEVEPSS 1.2%
Description
A buffer overflow issue was addressed with improved memory handling. This issue is fixed in iOS 12.5.3. 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..
How to fix CVE-2021-30666
To remediate CVE-2021-30666, upgrade the affected package to a fixed version below.
- —upgrade to 2.26.1-2 or later
- —upgrade to 2.26.3-1 or later
Is CVE-2021-30666 being exploited?
Yes — CVE-2021-30666 is on the CISA Known Exploited Vulnerabilities (KEV) catalog. Patch immediately.
Affected packages (2)
- from 0, < 2.26.1-2
- from 0, < 2.26.3-1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH8.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |