{"id":"CVE-2015-5123","kind":"vulnerability","aliases":["CVE-2015-5123"],"related":[],"title":"Adobe Flash Player: Adobe Flash Player Use-After-Free Vulnerability","description":"Use-after-free vulnerability in the BitmapData class in the ActionScript 3 (AS3) implementation in Adobe Flash Player 13.x through 13.0.0.302 on Windows and OS X, 14.x through 18.0.0.203 on Windows and OS X, 11.x through 11.2.202.481 on Linux, and 12.x through 18.0.0.204 on Linux Chrome installations 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.","summary":"Adobe Flash Player has a use-after-free bug in the BitmapData class of its ActionScript 3 code, which lets a remote attacker run code or crash the player. CISA lists it as actively exploited in the wild.","severity":"critical","cvss":10.0,"epss":0.1883,"exploited":true,"exploited_at":"2022-04-13T00:00:00+00:00","products":[{"name":"Adobe Flash Player","fixed":[],"affected":"","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["adobe-flash-player","browsers","exploited","macos","runtime","windows"],"not_affected_if":["flash-not-installed","managed-hosting"],"how_to_check":"Check whether any browser or machine has Adobe Flash Player installed, for example by looking for FlashPlayer plugin files or the Flash Player entry in installed software; the sources do not give a specific path.","fix":"Remove Adobe Flash Player, since the product is end-of-life and CISA says to disconnect it if still in use; no supported patched version is named in the sources.","status":"open","published_at":"2015-07-14T10:59:01+00:00","first_seen_at":"2026-10-23T19:11:52+00:00","triaged_at":"2026-10-23T21:17:59+00:00","updated_at":"2026-10-23T21:57:35+00:00","category":"runtime","confidence":0.8,"triage":{"at":"2026-10-23T21:17:59Z","model":"claude-haiku-5-5","output":{"fix":"Remove Adobe Flash Player, since the product is end-of-life and CISA says to disconnect it if still in use; no supported patched version is named in the sources.","reach":"internet","impact":"high","summary":"Adobe Flash Player has a use-after-free bug in the BitmapData class of its ActionScript 3 code, which lets a remote attacker run code or crash the player. CISA lists it as actively exploited in the wild.","category":"runtime","who_cares":["adobe-flash-player","browsers","windows","macos"],"confidence":0.8,"needs_auth":"no","worst_case":"Remote attacker runs code in the victim's browser session or crashes the player","analyst_note":"Confirm the affected and fixed Flash Player versions from the Adobe advisory, since the sources list them as unknown.","how_to_check":"Check whether any browser or machine has Adobe Flash Player installed, for example by looking for FlashPlayer plugin files or the Flash Player entry in installed software; the sources do not give a specific path.","needs_analyst":true,"not_affected_if":["flash-not-installed","managed-hosting"],"user_interaction":"yes","needs_special_setup":"no","severity_if_unknown":"high"},"cost_usd":0.000496,"input_tokens":2863,"output_tokens":420,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-2015':13A,16A '-5123':14A,17A '11':106C '11.2.202.481':109C '12':113C '13':88C '13.0.0.302':91C '14':97C '18.0.0.203':100C '18.0.0.204':116C '2015':152C '3':47B,81C 'actionscript':46B,80C 'activ':64B 'adob':1A,4A,22B,30B,85C 'adobe':18A 'adobe-flash-play':21B 'allow':121C 'arbitrari':126C 'as3':82C 'attack':53B,123C 'bitmapdata':42B,76C 'browser':25B 'bug':39B 'caus':129C 'chrome':119C 'cisa':60B 'class':43B,77C 'code':48B,55B,127C 'content':139C 'corrupt':135C 'craft':137C 'crash':57B 'cve':12A,15A 'denial':131C 'execut':125C 'exploit':26B,65B,146C 'flash':2A,5A,19A,23B,31B,86C,138C 'free':10A,38B,72C 'function':144C 'implement':83C 'instal':120C 'juli':151C 'let':50B 'linux':111C,118C 'list':61B 'maco':27B 'memori':134C 'os':95C,104C 'overrid':141C 'player':3A,6A,20A,24B,32B,59B,87C 'remot':52B,122C 'run':54B 'runtim':28B 'servic':133C 'use':8A,36B,70C 'use-after-fre':7A,35B,69C 'valueof':143C 'via':136C 'vulner':11A,73C 'wild':68B,149C 'window':29B,93C,102C 'x':89C,96C,98C,105C,107C,114C","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2015-07-14T10:59:01+00:00","kev":{"dateAdded":"2022-04-13","dueDate":"2022-05-04","requiredAction":"The impacted product is end-of-life and should be disconnected if still in use.","knownRansomwareCampaignUse":"Unknown"},"cvss_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cvss_by":"nvd@nist.gov","poc_count":0,"sources":[{"source":"kev","external_id":"CVE-2015-5123","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2015-5123","severity":null,"published_at":"2022-04-13T00:00:00+00:00","modified_at":null,"first_seen_at":"2026-10-23T19:11:52+00:00","fetched_at":"2026-10-25T10:39:06+00:00","note":null},{"source":"epss","external_id":"CVE-2015-5123","url":"https://api.first.org/data/v1/epss?cve=CVE-2015-5123","severity":null,"published_at":null,"modified_at":null,"first_seen_at":"2026-10-23T19:13:45+00:00","fetched_at":"2026-10-23T19:13:45+00:00","note":null},{"source":"nvd","external_id":"CVE-2015-5123","url":"https://nvd.nist.gov/vuln/detail/CVE-2015-5123","severity":null,"published_at":"2015-07-14T10:59:01+00:00","modified_at":"2026-06-17T00:28:31+00:00","first_seen_at":"2026-10-23T21:57:35+00:00","fetched_at":"2026-10-23T21:57:35+00:00","note":null}],"documents":[],"notice":"Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai"}