A downgrade issue was addressed with additional code-signing restrictions. This issue is fixed in macOS Tahoe 26. An app may be able to access protected user data.
Conclusion & alert: CVE-2025-43331 is rated Low Risk (17.1/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.02%).Mandatory action: Low composite risk—no urgent action required; patch on your normal maintenance cycle and revisit priority if CVSS or EPSS increases.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
Exploit prediction scoring system (EPSS) score for CVE-2025-43331
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).