به نقل از Secunia كه يكي از مراجع بيطرف در اين زمينه به شمار ميرود:
| Web server | Secunia advisories | Vulnerabilities | Unpatched Secunia advisories |
| IIS 6 | 5 | 4 | 0% |
| IIS 7 | 1 | 1 | 0% |
| Apache 2.0.x | 39 | 23 | 10% |
| Apache 2.2.x | 10 | 16 | 20% |
| Web server | Secunia advisories | Vulnerabilities | Unpatched Secunia advisories |
| IIS 6 | 5 | 4 | 0% |
| IIS 7 | 1 | 1 | 0% |
| Apache 2.0.x | 39 | 23 | 10% |
| Apache 2.2.x | 10 | 16 | 20% |
