Double free vulnerability in Microsoft Windows 2000, XP, 2003, and Vista allows local users to gain privileges by calling the MessageBox function with a MB_SERVICE_NOTIFICATION message with crafted data, which sends a HardError message to Client/Server Runtime Server Subsystem (CSRSS) process, which is not properly handled when invoking the UserHardError and GetHardErrorText functions in WINSRV.DLL.
Conclusion & alert: CVE-2006-6696 is rated High Exploit Risk (75.2/100): CVSS Medium severity, with high exploitation likelihood (EPSS 5.38%, 90th percentile). Core evidence: 2 public exploit reference(s) are indexed (Exploit-DB). EPSS rose +1.06% over the last day, indicating growing attacker interest. 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 |
|---|---|---|---|---|
| 3024 | exploit_db | edb | 2006-12-27 | Exploit-DB ↗ |
| 2967 | exploit_db | edb | 2006-12-20 | 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 | 2026-05-04 | 4.32% | 5.38% | +1.06% |
| 2 | 2025-12-28 | 8.92% | 4.32% | -4.60% |
| 3 | 2025-12-27 | — | 8.92% | — |
Full EPSS history (18 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 6.9 | 2.0 | MEDIUM |
|
3.4 | 10.0 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
alpine
|
— | CVE-2006-6696: no source package rows; 0 state rows across 0 repos (none); fixed 0, open 0. | https://security.alpinelinux.org/vuln/CVE-2006-6696 |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| microsoft | windows_2000 | — | cpe:2.3:o:microsoft:windows_2000:*:*:*:*:*:*:*:* |
| microsoft | windows_2000 | — | cpe:2.3:o:microsoft:windows_2000:*:sp1:*:*:*:*:*:* |
| microsoft | windows_2000 | — | cpe:2.3:o:microsoft:windows_2000:*:sp2:*:*:*:*:*:* |
| microsoft | windows_2000 | — | cpe:2.3:o:microsoft:windows_2000:*:sp3:*:*:*:*:*:* |
| microsoft | windows_2000 | — | cpe:2.3:o:microsoft:windows_2000:*:sp4:*:*:*:*:*:* |
| microsoft | windows_2003_server | datacenter_edition | cpe:2.3:o:microsoft:windows_2003_server:datacenter_edition:*:*:*:*:*:*:* |
| microsoft | windows_2003_server | datacenter_edition | cpe:2.3:o:microsoft:windows_2003_server:datacenter_edition:sp1:*:*:*:*:*:* |
| microsoft | windows_2003_server | datacenter_edition | cpe:2.3:o:microsoft:windows_2003_server:datacenter_edition:sp1_beta_1:*:*:*:*:*:* |
| microsoft | windows_2003_server | enterprise_edition | cpe:2.3:o:microsoft:windows_2003_server:enterprise_edition:sp1:*:*:*:*:*:* |
| microsoft | windows_2003_server | enterprise_edition | cpe:2.3:o:microsoft:windows_2003_server:enterprise_edition:sp1_beta_1:*:*:*:*:*:* |
| microsoft | windows_2003_server | sp1 | cpe:2.3:o:microsoft:windows_2003_server:sp1:*:enterprise:*:*:*:*:* |
| microsoft | windows_2003_server | standard | cpe:2.3:o:microsoft:windows_2003_server:standard:*:*:*:*:*:*:* |
| microsoft | windows_2003_server | standard | cpe:2.3:o:microsoft:windows_2003_server:standard:sp1:*:*:*:*:*:* |
| microsoft | windows_2003_server | standard | cpe:2.3:o:microsoft:windows_2003_server:standard:sp1_beta_1:*:*:*:*:*:* |
| microsoft | windows_2003_server | web | cpe:2.3:o:microsoft:windows_2003_server:web:*:*:*:*:*:*:* |
| microsoft | windows_2003_server | web | cpe:2.3:o:microsoft:windows_2003_server:web:sp1:*:*:*:*:*:* |
| microsoft | windows_2003_server | web | cpe:2.3:o:microsoft:windows_2003_server:web:sp1_beta_1:*:*:*:*:*:* |
| microsoft | windows_vista | — | cpe:2.3:o:microsoft:windows_vista:*:*:december_ctp:*:*:*:*:* |
| microsoft | windows_vista | — | cpe:2.3:o:microsoft:windows_vista:*:beta:*:*:*:*:*:* |
| microsoft | windows_vista | — | cpe:2.3:o:microsoft:windows_vista:*:beta1:*:*:*:*:*:* |
| microsoft | windows_vista | — | cpe:2.3:o:microsoft:windows_vista:*:beta2:*:*:*:*:*:* |
| microsoft | windows_xp | — | cpe:2.3:o:microsoft:windows_xp:*:*:home:*:*:*:*:* |
| microsoft | windows_xp | — | cpe:2.3:o:microsoft:windows_xp:*:*:media_center:*:*:*:*:* |
| microsoft | windows_xp | — | cpe:2.3:o:microsoft:windows_xp:*:gold:professional:*:*:*:*:* |
| microsoft | windows_xp | — | cpe:2.3:o:microsoft:windows_xp:*:sp1:home:*:*:*:*:* |
| microsoft | windows_xp | — | cpe:2.3:o:microsoft:windows_xp:*:sp1:media_center:*:*:*:*:* |
| microsoft | windows_xp | — | cpe:2.3:o:microsoft:windows_xp:*:sp2:home:*:*:*:*:* |
| microsoft | windows_xp | — | cpe:2.3:o:microsoft:windows_xp:*:sp2:media_center:*:*:*:*:* |
| microsoft | windows_xp | — | cpe:2.3:o:microsoft:windows_xp:*:sp2:tablet_pc:*:*:*:*:* |