The OpenSSLX509Certificate class in org/conscrypt/OpenSSLX509Certificate.java in Android before 5.1.1 LMY48I improperly includes certain context data during serialization and deserialization, which allows attackers to execute arbitrary code via an application that sends a crafted Intent, aka internal bug 21437603.
Conclusion & alert: CVE-2015-3837 is rated Moderate Risk (64.6/100): CVSS Critical severity, with medium exploitation likelihood (EPSS 1.07%). Mandatory action: Review affected assets and schedule 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 | 2026-02-22 | 0.79% | 1.07% | +0.28% |
| 2 | 2025-03-30 | 5.50% | 0.79% | -4.71% |
| 3 | 2025-03-29 | — | 5.50% | — |
Full EPSS history (10 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] |