Input validation error in macOS - CVE-2025-43494

Vulnerability identifier: #VU119949

CSH Severity: Medium

CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2025-43494

CWE-ID: CWE-20

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of email headers in the Mail app. A remote attacker can send a specially crafted email to the victim and cause a persistent denial-of-service.

macOS
iPadOS
Apple iOS
visionOS
watchOS

Install updates from vendor's website.

macOS - addressed in versions 15.7.2 24G325, 14.8.2 23J126, 26.1 25B78
iPadOS - addressed in versions 18.7.2 22H124, 26.1 23B85
Apple iOS - addressed in versions 18.7.2 22H124, 26.1 23B85
visionOS - update to 26.1
watchOS - update to 26.1 23S37

• https://support.apple.com/en-us/125635

• Multiple vulnerabilities in macOS Sequoia
• Multiple vulnerabilities in Apple macOS Sonoma
• Multiple vulnerabilities in Apple watchOS
• Multiple vulnerabilities in Apple visionOS
• Multiple vulnerabilities in Apple iOS 18 and iPadOS 18
• Multiple vulnerabilities in Apple iOS 26 and iPadOS 26
• Multiple vulnerabilities in Apple macOS Tahoe