Buffer overflow in the HTML library used by Internet Explorer, Outlook Express, and Windows Explorer via the res: local resource protocol.
Conclusion & alert: CVE-1999-0967 is rated High Risk (68.1/100): CVSS Critical severity, with high exploitation likelihood (EPSS 17.92%, 95th 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 | 2025-03-30 | 31.91% | 17.92% | -14.00% |
| 2 | 2025-03-29 | 17.92% | 31.91% | +14.00% |
| 3 | 2025-03-19 | — | 17.92% | — |
Full EPSS history (8 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 10.0 | 2.0 | HIGH |
|
10.0 | 10.0 | [email protected] |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| microsoft | internet_explorer | 4.0 | cpe:2.3:a:microsoft:internet_explorer:4.0:*:*:*:*:*:*:* |
| microsoft | outlook_express | — | cpe:2.3:a:microsoft:outlook_express:*:*:*:*:*:*:*:* |
| microsoft | windows_explorer | — | cpe:2.3:a:microsoft:windows_explorer:*:*:*:*:*:*:*:* |