CVE-2021-30666 is a vulnerability in Apple iOS
Published on September 8, 2021
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..
Known Exploited Vulnerability
This Apple iOS12.x Buffer Overflow vulnerability is part of CISA's list of Known Exploited Vulnerabilities. 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.
The following remediation steps are recommended / required by November 17, 2021: Apply updates per vendor instructions.
Vulnerability Analysis
CVE-2021-30666 is exploitable with network access, requires user interaction. This vulnerability is considered to have a low attack complexity. This vulnerability is known to be actively exploited by threat actors. The potential impact of an exploit of this vulnerability is considered to be very high.
Weakness Type
What is a Buffer Overflow Vulnerability?
The software performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer.
CVE-2021-30666 has been classified to as a Buffer Overflow vulnerability or weakness.
Products Associated with CVE-2021-30666
You can be notified by email with stack.watch whenever vulnerabilities like CVE-2021-30666 are published in Apple iOS:
Affected Versions
Apple iOS:- Version unspecified and below 12.5 is affected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.