#VU119949 Input validation error in macOS - CVE-2025-43494
Published: December 13, 2025 / Updated: December 18, 2025
Vulnerability identifier: #VU119949
Vulnerability risk: Medium
CVSSv4.0: 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/E:U/U:Green
CVE-ID: CVE-2025-43494
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
macOS
macOS
Software vendor:
Apple Inc.
Apple Inc.
Description
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.
Remediation
Install updates from vendor's website.