An issue was discovered in certain Apple products. Xcode before 9.3 is affected. The issue, which is unspecified, involves the "LLVM" component.
Conclusion & alert: CVE-2018-4164 is rated High Risk (67.7/100): CVSS Critical severity, with medium exploitation likelihood (EPSS 2.50%). Mandatory action: High exploitation likelihood—assess exposure and prioritize remediation.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2026-06-15 | 2.90% | 2.50% | -0.40% |
| 2 | 2025-10-18 | 3.05% | 2.90% | -0.15% |
| 3 | 2025-03-30 | — | 3.05% | — |
Full EPSS history (13 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 9.8 | 3.0 | CRITICAL |
|
3.9 | 5.9 | [email protected] |
| 10.0 | 2.0 | HIGH |
|
10.0 | 10.0 | [email protected] |
| URL | Tags |
|---|---|
| http://lists.llvm.org/pipermail/llvm-commits/ | Third Party Advisory |
| http://releases.llvm.org/ | Third Party Advisory |
| http://www.securityfocus.com/bid/103583 | Third Party Advisory VDB Entry |
| http://www.securitytracker.com/id/1040610 | Third Party Advisory VDB Entry |
| https://developer.apple.com/library/content/releasenotes/DeveloperTools/RN-Xcode/Chapters/Introduction.html | Release Notes Vendor Advisory |
| https://support.apple.com/HT208699 | Vendor Advisory |