---
id: "CVE-2015-5119"
kind: "vulnerability"
aliases: ["CVE-2015-5119"]
title: "Adobe Flash Player: Adobe Flash Player Use-After-Free Vulnerability"
severity: "critical"
cvss: 10.0
epss: 0.98618
exploited: true
status: "open"
category: "vendor"
products: [{"name": "Adobe Flash Player", "fixed": [], "affected": "", "ecosystem": "vendor"}]
ecosystems: ["vendor"]
tags: ["adobe-flash-player", "browsers", "exploited", "macos", "vendor", "windows"]
not_affected_if: ["flash-not-installed"]
published_at: "2015-07-08T14:59:05+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-2015-5119", "first_seen_at": "2026-10-23T19:11:52+00:00"}, {"source": "epss", "url": "https://api.first.org/data/v1/epss?cve=CVE-2015-5119", "first_seen_at": "2026-10-23T19:13:44+00:00"}, {"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2015-5119", "first_seen_at": "2026-10-23T21:57:35+00:00"}]
---

# Adobe Flash Player: Adobe Flash Player Use-After-Free Vulnerability

Adobe Flash Player has a use-after-free bug in its ActionScript 3 ByteArray class. An attacker who gets a user to load crafted Flash content can run code on that user's machine.

_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 browser, for example by looking for FlashPlayer plugin files in the browser plugin directories.

## Fix

Remove Adobe Flash Player; the product is end-of-life and no longer receives patches. Disconnect any system that still needs it.

## Timeline

- 2026-10-23T19:11:52+00:00 kev https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2015-5119
- 2026-10-23T19:13:44+00:00 epss https://api.first.org/data/v1/epss?cve=CVE-2015-5119
- 2026-10-23T21:57:35+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2015-5119

## From the sources

Use-after-free vulnerability in the ByteArray class in the ActionScript 3 (AS3) implementation in Adobe Flash Player 13.x through 13.0.0.296 and 14.x through 18.0.0.194 on Windows and OS X and 11.x through 11.2.202.468 on Linux allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via crafted Flash content that overrides a valueOf function, as exploited in the wild in July 2015.

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