Stack-based buffer overflow in Microsoft HTML Help Workshop 4.74.8702.0, and possibly earlier versions, and as included in the Microsoft HTML Help 1.4 SDK, allows context-dependent attackers to execute arbitrary code via a .hhp file with a long Contents file field.
Conclusion & alert: CVE-2006-0564 is rated High Exploit Risk (74.8/100): CVSS High severity, with high exploitation likelihood (EPSS 71.46%, 99th percentile). Core evidence: 8 public exploit reference(s) are indexed (Exploit-DB). Mandatory action: Public exploits are available—assess exposure, apply mitigations, and prioritize patching.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
| EDB-ID | Source | Kind | Published | Link |
|---|---|---|---|---|
| 16648 | exploit_db | edb | 2010-09-25 | Exploit-DB ↗ |
| 16683 | exploit_db | edb | 2010-09-25 | Exploit-DB ↗ |
| 10321 | exploit_db | edb | 2009-12-05 | Exploit-DB ↗ |
| 7727 | exploit_db | edb | 2009-01-12 | Exploit-DB ↗ |
| 1495 | exploit_db | edb | 2006-02-14 | Exploit-DB ↗ |
| 1490 | exploit_db | edb | 2006-02-11 | Exploit-DB ↗ |
| 1488 | exploit_db | edb | 2006-02-10 | Exploit-DB ↗ |
| 1470 | exploit_db | edb | 2006-02-06 | Exploit-DB ↗ |
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 | 82.71% | 71.46% | -11.26% |
| 2 | 2026-03-07 | 81.03% | 82.71% | +1.69% |
| 3 | 2026-03-02 | — | 81.03% | — |
Full EPSS history (17 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 7.5 | 2.0 | HIGH |
|
10.0 | 6.4 | [email protected] |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| microsoft | html_help | 1.4 | cpe:2.3:a:microsoft:html_help:1.4:*:sdk:*:*:*:*:* |
| microsoft | html_help_workshop | 4.74.8702.0 | cpe:2.3:a:microsoft:html_help_workshop:4.74.8702.0:*:*:*:*:*:*:* |