Multiple heap-based buffer overflows in the AddTab method in the (1) Tab and (2) CTab ActiveX controls in c1sizer.ocx and the (3) TabOne ActiveX control in sizerone.ocx in ComponentOne SizerOne 8.0.20081.140, as used in ComponentOne Studio for ActiveX 2008, TSC2 Help Desk 4.1.8, SAP GUI 6.40 Patch 29 and 7.10, and possibly other products, allow remote attackers to execute arbitrary code by adding many tabs, or adding tabs with long tab captions.
Conclusion & alert: CVE-2008-4827 is rated Moderate Risk (64.8/100): CVSS Critical severity, with high exploitation likelihood (EPSS 6.71%, 93th 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 | 20.54% | 6.71% | -13.83% |
| 2 | 2026-02-28 | 25.20% | 20.54% | -4.66% |
| 3 | 2025-05-25 | — | 25.20% | — |
Full EPSS history (12 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 |
|---|---|---|---|
| componentone | sizerone | 8.0.20081.140 | cpe:2.3:a:componentone:sizerone:8.0.20081.140:*:*:*:*:*:*:* |
| sap | sap_gui | 6.40 | cpe:2.3:a:sap:sap_gui:6.40:*:*:*:*:*:*:* |
| sap | sap_gui | 7.10 | cpe:2.3:a:sap:sap_gui:7.10:*:*:*:*:*:*:* |
| sap | tabone | 7.0.0.16 | cpe:2.3:a:sap:tabone:7.0.0.16:*:*:*:*:*:*:* |
| servantix | tsc2_help_desk | 4.18 | cpe:2.3:a:servantix:tsc2_help_desk:4.18:*:*:*:*:*:*:* |