The Just In Time (JIT) Compiler service in Microsoft .NET Framework 1.0, 1.1, and 2.0 for Windows 2000, XP, Server 2003, and Vista allows user-assisted remote attackers to execute arbitrary code via unspecified vectors involving an "unchecked buffer," probably a buffer overflow, aka ".NET JIT Compiler Vulnerability".
Conclusion & alert: CVE-2007-0043 is rated High Risk (66.5/100): CVSS Critical severity, with high exploitation likelihood (EPSS 30.67%, 98th 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 | 62.17% | 30.67% | -31.50% |
| 2 | 2026-02-27 | 61.82% | 62.17% | +0.34% |
| 3 | 2025-10-23 | — | 61.82% | — |
Full EPSS history (17 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 9.3 | 2.0 | HIGH |
|
8.6 | 10.0 | [email protected] |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| microsoft | .net_framework | 1.0 | cpe:2.3:a:microsoft:.net_framework:1.0:*:*:*:*:*:*:* |
| microsoft | .net_framework | 1.1 | cpe:2.3:a:microsoft:.net_framework:1.1:*:*:*:*:*:*:* |
| microsoft | .net_framework | 2.0 | cpe:2.3:a:microsoft:.net_framework:2.0:*:*:*:*:*:*:* |