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CVE-2021-30666

Severity
HIGH
CVSS
8.8
EPSS
0.03031
Risk score
61.26
CISA KEV
Yes
PoC
No
Published
2021-09-08
Modified
2025-10-21
First seen
2026-08-07
Aliases
EUVD-2021-17583, GHSA-4CX8-FRPF-FJC3
Products
Apple:iOS, Cisco:IOS unspecified <12.5
Sources
euvd EUVD-2021-17583
cisa.gov CVE-2021-30666

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..

References