Buffer overflow in macOS - CVE-2025-43520
Published: December 13, 2025 / Updated: March 20, 2026
Vulnerability identifier: #VU119948
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:A/U:Clear
CVE-ID: CVE-2025-43520
CWE-ID: CWE-119
Exploitation vector: Local access
Exploit availability:
The vulnerability is being exploited in the wild
Vendor: Apple Inc.
Affected software:
macOS
macOS
Detailed vulnerability description
The vulnerability allows a local application to escalate privileges on the system.
The vulnerability exists due to a boundary error within the OS kernel. A local application can trigger memory corruption and execute arbitrary code on the target system.
How to mitigate CVE-2025-43520
Install updates from vendor's website.