Improper input validation in macOS - CVE-2026-43800

Vulnerability identifier: #VU143775

CSH Severity: Low

CVSS v4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-43800

CWE-ID: CWE-20

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local application to gain access to sensitive information.

The vulnerability exists due to insufficient input validation in Siri. A local application can access sensitive user data.

macOS
tvOS
iPadOS
Apple iOS
watchOS

Install update from vendor's website.

macOS - update to 26.6 25G72
tvOS - update to 26.6 23L773
iPadOS - update to 26.6 23G71
Apple iOS - update to 26.6 23G71
watchOS - update to 26.6 23U67

• https://support.apple.com/en-us/128067

• Multiple vulnerabilities in macOS Tahoe
• Multiple vulnerabilities in iOS 26 and iPadOS 26
• Multiple vulnerabilities in Apple tvOS
• Multiple vulnerabilities in Apple watchOS