Multiple stack-based buffer overflows in Invensys Wonderware Information Server 3.1, 4.0, and 4.0 SP1 allow remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via two unspecified ActiveX controls.
Conclusion & alert: CVE-2011-2962 is rated High Risk (70.2/100): CVSS Critical severity, with high exploitation likelihood (EPSS 4.56%, 90th percentile). Core evidence: EPSS ranks this CVE among the most likely to be exploited in the near term. EPSS rose +1.42% 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 | 2026-06-15 | 3.15% | 4.56% | +1.42% |
| 2 | 2025-09-02 | 4.07% | 3.15% | -0.92% |
| 3 | 2025-06-19 | — | 4.07% | — |
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 |
|---|---|---|---|
| invensys | wonderware_information_server | 3.1 | cpe:2.3:a:invensys:wonderware_information_server:3.1:*:*:*:*:*:*:* |
| invensys | wonderware_information_server | 4.0 | cpe:2.3:a:invensys:wonderware_information_server:4.0:*:*:*:*:*:*:* |
| invensys | wonderware_information_server | 4.0 | cpe:2.3:a:invensys:wonderware_information_server:4.0:sp1:*:*:*:*:*:* |