The keep-alive mechanism for Microsoft SQL Server 2000 allows remote attackers to cause a denial of service (bandwidth consumption) via a "ping" style packet to the Resolution Service (UDP port 1434) with a spoofed IP address of another SQL Server system, which causes the two servers to exchange packets in an infinite loop.
Conclusion & alert: CVE-2002-0650 is rated Moderate Risk (48.9/100): CVSS Medium severity, with high exploitation likelihood (EPSS 18.29%, 97th percentile). Core evidence: EPSS ranks this CVE among the most likely to be exploited in the near term. 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 | 25.22% | 18.29% | -6.94% |
| 2 | 2025-03-30 | 24.77% | 25.22% | +0.46% |
| 3 | 2025-03-29 | — | 24.77% | — |
Full EPSS history (11 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 5.0 | 2.0 | MEDIUM |
|
10.0 | 2.9 | [email protected] |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| microsoft | sql_server | 2000 | cpe:2.3:a:microsoft:sql_server:2000:*:*:*:*:*:*:* |
| microsoft | sql_server | 2000 | cpe:2.3:a:microsoft:sql_server:2000:sp1:*:*:*:*:*:* |
| microsoft | sql_server | 2000 | cpe:2.3:a:microsoft:sql_server:2000:sp2:*:*:*:*:*:* |