Microsoft Exchange 2000 Server SP3, Exchange Server 2003 SP2, and Exchange Server 2007 SP1 do not properly interpret Transport Neutral Encapsulation (TNEF) properties, which allows remote attackers to execute arbitrary code via a crafted TNEF message, aka "Memory Corruption Vulnerability."
Conclusion & alert: CVE-2009-0098 is rated High Risk (73.3/100): CVSS Critical severity, with high exploitation likelihood (EPSS 64.18%, 98th percentile). Core evidence: EPSS ranks this CVE among the most likely to be exploited in the near term. EPSS rose +1.68% over the last day, indicating growing attacker interest. 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 | 2026-05-16 | 62.51% | 64.18% | +1.68% |
| 2 | 2026-05-15 | 64.18% | 62.51% | -1.68% |
| 3 | 2026-05-13 | — | 64.18% | — |
Full EPSS history (38 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 | exchange_server | 2000 | cpe:2.3:a:microsoft:exchange_server:2000:sp3:*:*:*:*:*:* |
| microsoft | exchange_server | 2003 | cpe:2.3:a:microsoft:exchange_server:2003:sp2:*:*:*:*:*:* |
| microsoft | exchange_server | 2007 | cpe:2.3:a:microsoft:exchange_server:2007:sp1:*:*:*:*:*:* |