Improper input validation in macOS - CVE-2026-43777
Published: August 17, 2026
Vulnerability identifier: #VU143770
CSH Severity: Low
CVSS v4: 4.6 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-43777
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to insufficient input validation in Screen Sharing Server. A remote attacker can trick the victim into opening a specially crafted file and cause a denial of service.
Affected software
macOS
How to mitigate CVE-2026-43777
Install update from vendor's website.
macOS - addressed in versions 26.6 25G72, 14.8.8 23J620, 15.7.8 24G824