---
id: "CVE-2016-4117"
kind: "vulnerability"
aliases: ["CVE-2016-4117"]
title: "Adobe Flash Player: Adobe Flash Player Arbitrary Code Execution Vulnerability"
severity: "critical"
cvss: 10.0
epss: 0.94354
exploited: true
status: "open"
category: "vendor"
products: [{"name": "Adobe Flash Player", "fixed": [], "affected": "", "ecosystem": "vendor"}]
ecosystems: ["vendor"]
tags: ["adobe-flash-player", "browsers", "exploited", "macos", "ransomware", "vendor", "windows"]
not_affected_if: ["no-flash-installed"]
published_at: "2016-05-11T01:59:46+00:00"
first_seen_at: "2026-10-23T19:11:52+00:00"
updated_at: "2026-10-23T21:57:35+00:00"
sources: [{"source": "kev", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2016-4117", "first_seen_at": "2026-10-23T19:11:52+00:00"}, {"source": "epss", "url": "https://api.first.org/data/v1/epss?cve=CVE-2016-4117", "first_seen_at": "2026-10-23T19:13:44+00:00"}, {"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2016-4117", "first_seen_at": "2026-10-23T21:57:35+00:00"}]
---

# Adobe Flash Player: Adobe Flash Player Arbitrary Code Execution Vulnerability

Adobe Flash Player has a type-confusion bug that lets an attacker run code on a machine through a crafted Flash file. CISA lists it as actively exploited, and the sources note it is used in ransomware campaigns.

_Summary, check and fix written by a model from the sources; labelled as such._

## Affected

- vendor:Adobe Flash Player affected ? fixed ?

## How to check

Check whether Adobe Flash Player is installed on any endpoint or server, for example by looking for Flash Player plugin files in browser plugin directories.

## Fix

Remove Adobe Flash Player and disconnect any system still using it, since the product is end-of-life (CISA required action).

## Timeline

- 2026-10-23T19:11:52+00:00 kev https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2016-4117
- 2026-10-23T19:13:44+00:00 epss https://api.first.org/data/v1/epss?cve=CVE-2016-4117
- 2026-10-23T21:57:35+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2016-4117

## From the sources

An access of resource using incompatible type vulnerability exists within Adobe Flash Player that allows an attacker to perform remote code execution.

CISA required action: The impacted product is end-of-life and should be disconnected if still in use.

---

_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_