CVE-2025-3839
HIGHDescription
A flaw was found in Epiphany, a tool that allows websites to open external URL handler applications with minimal user interaction. This design can be misused to exploit vulnerabilities within those handlers, making them appear remotely exploitable. The browser fails to properly warn or gate this action, resulting in potential code execution on the client device via trusted UI behavior.
How to fix
TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works
Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.
CVSS v3 Vector
Exploitability
Impact
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:N
Exploit Intelligence
Low risk: more likely to be exploited than 30% of all known CVEs.
References
Related Vulnerabilities
Other CWE-356 vulnerabilities, ordered by exploit likelihood. View all
| CVE | Severity | CVSS | EPSS | Exploited | Fix |
|---|---|---|---|---|---|
| CVE-2018-16858 | High | 7.8 | 67% | - | Fix |
| CVE-2019-6737 | High | 8.8 | 3.8% | - | - |
| CVE-2019-6738 | High | 8.8 | 3.7% | - | - |
| CVE-2019-6736 | High | 8.8 | 3.7% | - | - |
| CVE-2019-13322 | High | 8.8 | 2.6% | - | Fix |
| CVE-2019-17151 | Medium | 5.4 | 1.4% | - | Fix |
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Markdown
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<a href="https://tridentstack.com/cve/CVE-2025-3839"><img src="https://tridentstack.com/cve/badge/CVE-2025-3839.svg" alt="CVE-2025-3839"></a>Find and fix vulnerabilities across your fleet
TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.
This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-01-26.