Unspecified vulnerability in International Components for Unicode (ICU) before 53.1.0, as used in Apple OS X before 10.11 and watchOS before 2, has unknown impact and attack vectors.
Conclusion & alert: CVE-2015-5922 is rated High Risk (66.2/100): CVSS Critical severity, with medium exploitation likelihood (EPSS 1.04%). 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 | 2026-04-01 | 1.99% | 1.04% | -0.94% |
| 2 | 2025-06-20 | 1.04% | 1.99% | +0.94% |
| 3 | 2025-03-30 | — | 1.04% | — |
Full EPSS history (8 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 10.0 | 2.0 | HIGH |
|
10.0 | 10.0 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
ubuntu
|
medium | CVE-2015-5922 medium priority: Ubuntu including 1 source packages (icu), 5 status rows across 5 suites (precise, trusty, upstream, vivid, wily): not-affected 4, needs-triage 1. | https://ubuntu.com/security/CVE-2015-5922 |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| apple | mac_os_x | < 10.11 | cpe:2.3:o:apple:mac_os_x:*:*:*:*:*:*:*:* |
| apple | watchos | <= 1.01 | cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:* |
| icu-project | international_components_for_unicode | < 53.1 | cpe:2.3:a:icu-project:international_components_for_unicode:*:*:*:*:*:c\/c\+\+:*:* |
| URL | Tags |
|---|---|
| http://lists.apple.com/archives/security-announce/2015/Sep/msg00005.html | Mailing List Vendor Advisory |
| http://lists.apple.com/archives/security-announce/2015/Sep/msg00008.html | Mailing List Vendor Advisory |
| http://www.securityfocus.com/bid/76911 | Third Party Advisory VDB Entry |
| http://www.securitytracker.com/id/1033703 | Third Party Advisory VDB Entry |
| https://support.apple.com/HT205213 | Vendor Advisory |
| https://support.apple.com/HT205267 | Vendor Advisory |
| https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html |