#VU54102 Buffer overflow in Apple iOS

Published: 2021-06-14

Vulnerability identifier: #VU54102

Vulnerability risk: Critical

CVSSv3.1: 8.4 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:H/RL:O/RC:C]

CVE-ID: CVE-2021-30761


Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Apple iOS
Operating systems & Components / Operating system

Vendor: Apple Inc.


The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error when processing HTML content within the WebKit component in Apple iOS. A remote attacker can create a specially crafted web page, trick the victim into opening it, trigger memory corruption and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Note, the vulnerability is being actively exploited in the wild.

Install updates from vendor's website.

Vulnerable software versions

Apple iOS: 12.5 16H20 - 12.5.3 16H41, 12.3 16F156 - 12.3.2 16F250, 12.1 16B92 - 12.1.4 16D57, 12.0 16A366 - 12.0.1 16A405, 12.4 16G77 - 12.4.9 16H5

External links

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

Yes. This vulnerability is being exploited in the wild.

Latest bulletins with this vulnerability