{"id":"CVE-2018-4878","kind":"vulnerability","aliases":["CVE-2018-4878"],"related":[],"title":"Adobe Flash Player: Adobe Flash Player Use-After-Free Vulnerability","description":"A use-after-free vulnerability was discovered in Adobe Flash Player before 28.0.0.161. This vulnerability occurs due to a dangling pointer in the Primetime SDK related to media player handling of listener objects. A successful attack can lead to arbitrary code execution. This was exploited in the wild in January and February 2018.","summary":"Adobe Flash Player has a use-after-free memory bug that lets an attacker run code on the victim's machine. CISA lists it as exploited in the wild and tied to ransomware campaigns.","severity":"high","cvss":7.8,"epss":0.89532,"exploited":true,"exploited_at":"2021-11-03T00:00:00+00:00","products":[{"name":"Adobe Flash Player","fixed":[],"affected":"","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["adobe-flash-player","browsers","exploited","macos","ransomware","runtime","windows"],"not_affected_if":["no-flash-installed"],"how_to_check":"Check whether Adobe Flash Player is installed on any machine or browser profile, for example by looking for FlashPlayer plugin files or running the Flash version check in the browser.","fix":"Remove Adobe Flash Player, since the product is end-of-life and no fixed version is available from the sources.\nDisconnect any system that still needs Flash from the network until it is removed.","status":"open","published_at":"2018-02-06T21:29:00+00:00","first_seen_at":"2026-10-23T19:11:53+00:00","triaged_at":"2026-10-23T21:37:10+00:00","updated_at":"2026-10-23T21:57:35+00:00","category":"runtime","confidence":0.8,"triage":{"at":"2026-10-23T21:37:10Z","model":"claude-haiku-5-5","output":{"fix":"Remove Adobe Flash Player, since the product is end-of-life and no fixed version is available from the sources.\nDisconnect any system that still needs Flash from the network until it is removed.","reach":"internet","impact":"high","summary":"Adobe Flash Player has a use-after-free memory bug that lets an attacker run code on the victim's machine. CISA lists it as exploited in the wild and tied to ransomware campaigns.","category":"runtime","who_cares":["adobe-flash-player","browsers","windows","macos"],"confidence":0.8,"needs_auth":"no","worst_case":"Attacker runs arbitrary code on the affected machine via a crafted Flash file.","analyst_note":"Confirm the fixed or last patched version and any removal guidance from Adobe's EOL notice; the sources do not name affected version ranges.","how_to_check":"Check whether Adobe Flash Player is installed on any machine or browser profile, for example by looking for FlashPlayer plugin files or running the Flash version check in the browser.\nunknown","needs_analyst":true,"not_affected_if":["no-flash-installed"],"user_interaction":"yes","needs_special_setup":"no","severity_if_unknown":"high"},"cost_usd":0.000493,"input_tokens":2826,"output_tokens":421,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-2018':13A,16A '-4878':14A,17A '2018':119C '28.0.0.161':79C 'adob':1A,4A,22B,31B,75C 'adobe':18A 'adobe-flash-play':21B 'arbitrari':106C 'attack':45B,102C 'browser':25B 'bug':41B 'campaign':65B 'cisa':53B 'code':47B,107C 'cve':12A,15A 'dangl':86C 'discov':73C 'due':83C 'execut':108C 'exploit':26B,57B,111C 'februari':118C 'flash':2A,5A,19A,23B,32B,76C 'free':10A,39B,70C 'handl':96C 'januari':116C 'lead':104C 'let':43B 'list':54B 'listen':98C 'machin':52B 'maco':27B 'media':94C 'memori':40B 'object':99C 'occur':82C 'player':3A,6A,20A,24B,33B,77C,95C 'pointer':87C 'primetim':90C 'ransomwar':28B,64B 'relat':92C 'run':46B 'runtim':29B 'sdk':91C 'success':101C 'tie':62B 'use':8A,37B,68C 'use-after-fre':7A,36B,67C 'victim':50B 'vulner':11A,71C,81C 'wild':60B,114C 'window':30B","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2018-02-06T21:29:00+00:00","kev":{"dateAdded":"2021-11-03","dueDate":"2022-05-03","requiredAction":"The impacted product is end-of-life and should be disconnected if still in use.","knownRansomwareCampaignUse":"Known"},"cvss_vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","cvss_by":"nvd@nist.gov","poc_count":0,"sources":[{"source":"kev","external_id":"CVE-2018-4878","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2018-4878","severity":null,"published_at":"2021-11-03T00:00:00+00:00","modified_at":null,"first_seen_at":"2026-10-23T19:11:53+00:00","fetched_at":"2026-10-25T19:35:26+00:00","note":null},{"source":"epss","external_id":"CVE-2018-4878","url":"https://api.first.org/data/v1/epss?cve=CVE-2018-4878","severity":null,"published_at":null,"modified_at":null,"first_seen_at":"2026-10-23T19:13:44+00:00","fetched_at":"2026-10-23T19:13:44+00:00","note":null},{"source":"nvd","external_id":"CVE-2018-4878","url":"https://nvd.nist.gov/vuln/detail/CVE-2018-4878","severity":null,"published_at":"2018-02-06T21:29:00+00:00","modified_at":"2026-06-17T01:59:12+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"}