CVE-2023-41061

Apple patched an input validation flaw (CVE-2023-41061, CWE-20) in the Wallet component of iOS, iPadOS, and watchOS that can allow arbitrary code execution when a user interacts with a maliciously crafted attachment. The attack is local and requires user interaction (CVSS 7.8, AV:L/UI:R), so the victim must open or act on the crafted attachment — typically delivered through messaging or another application — for the exploit to succeed. A successful attack yields code execution on the device, and media reports describe it as having been used in 'extremely sophisticated attacks' chained with other Apple zero-days. Anyone running iPhone OS (iOS), iPadOS, or watchOS versions prior to iOS/iPadOS 16.6.1 and watchOS 9.6.2 is affected, a population on the order of a billion active devices. Apple disclosed the issue as actively exploited, and CISA added it to the Known Exploited Vulnerabilities (KEV) catalog on 2023-09-11.

What to do: Immediately update iPhones and iPads to iOS/iPadOS 16.6.1 or later, and Apple Watch to watchOS 9.6.2 or later. Because the flaw is listed in CISA's KEV catalog and was actively exploited at disclosure, treat patching as urgent for all user fleets, especially high-value targets; until patched, exercise caution with attachments from untrusted sources. No public proof-of-concept is known, but defenders should check fleet OS versions for stragglers on pre-16.6.1 builds.