Microsoft XML Core Services 3.0 and 5.0 supports SSL 2.0, which makes it easier for remote attackers to defeat cryptographic protection mechanisms by sniffing the network and conducting a decryption attack, aka "MSXML Information Disclosure Vulnerability," a different vulnerability than CVE-2015-2471.
Conclusion & alert: CVE-2015-2434 is rated Moderate Risk (45.9/100): CVSS Medium severity, with high exploitation likelihood (EPSS 15.54%, 96th 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 | 25.79% | 15.54% | -10.25% |
| 2 | 2025-11-21 | 30.69% | 25.79% | -4.90% |
| 3 | 2025-03-30 | — | 30.69% | — |
Full EPSS history (14 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 4.3 | 2.0 | MEDIUM |
|
8.6 | 2.9 | [email protected] |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| microsoft | xml_core_services | 3.0 | cpe:2.3:a:microsoft:xml_core_services:3.0:*:*:*:*:*:*:* |
| microsoft | xml_core_services | 5.0 | cpe:2.3:a:microsoft:xml_core_services:5.0:*:*:*:*:*:*:* |