Remote code execution in Apple watchOS

Published: 2021-05-03
Risk Critical
Patch available YES
Number of vulnerabilities 1
CVE ID CVE-2021-30665
Exploitation vector Network
Public exploit This vulnerability is being exploited in the wild.
Vulnerable software
Operating systems & Components / Operating system

Vendor Apple Inc.

Security Advisory

This security advisory describes one critical risk vulnerability.

1) Buffer overflow

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] [PCI]

CVE-ID: CVE-2021-30665

CWE-ID: CWE-119 - Improper Restriction of Operations within the Bounds of a Memory Buffer

Exploit availability: No


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

The vulnerability exists due to a boundary error in WebKit. 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 update from vendor's website.

Vulnerable software versions

watchOS: 7.0 18R382, 7.0.1 18R395, 7.0.2 18R402, 7.0.3 18R410, 7.1 18R590, 7.2 18S564, 7.3 18S801, 7.3.1 18S811, 7.3.2 18S821, 7.3.3 18S830, 7.4 18T195

CPE 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.