{"id":"CVE-2018-4939","kind":"vulnerability","aliases":["CVE-2018-4939"],"related":[],"title":"Adobe ColdFusion: Adobe ColdFusion Deserialization of Untrusted Data Vulnerability","description":"Adobe ColdFusion Update 5 and earlier versions, ColdFusion 11 Update 13 and earlier versions have an exploitable Deserialization of Untrusted Data vulnerability. Successful exploitation could lead to arbitrary code execution.","summary":"Adobe ColdFusion deserializes untrusted data without checks, letting a crafted request run code on the server. An attacker who reaches the server gets code execution there, and CISA lists it as exploited in the wild.","severity":"critical","cvss":10.0,"epss":0.61987,"exploited":true,"exploited_at":"2021-11-03T00:00:00+00:00","products":[{"name":"Adobe ColdFusion","fixed":[],"affected":"","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["coldfusion","exploited","runtime","self-hosted","windows"],"not_affected_if":["managed-hosting"],"how_to_check":null,"fix":"Apply the Adobe ColdFusion updates for this CVE per vendor instructions; exact fixed build numbers are not in the sources.","status":"open","published_at":"2018-05-19T17:29:01+00:00","first_seen_at":"2026-10-23T19:11:53+00:00","triaged_at":"2026-10-23T21:37:23+00:00","updated_at":"2026-10-23T21:57:35+00:00","category":"runtime","confidence":0.6,"triage":{"at":"2026-10-23T21:37:23Z","model":"claude-haiku-5-5","output":{"fix":"Apply the Adobe ColdFusion updates for this CVE per vendor instructions; exact fixed build numbers are not in the sources.","reach":"internet","impact":"high","summary":"Adobe ColdFusion deserializes untrusted data without checks, letting a crafted request run code on the server. An attacker who reaches the server gets code execution there, and CISA lists it as exploited in the wild.","category":"runtime","who_cares":["coldfusion","self-hosted","windows"],"confidence":0.6,"needs_auth":"unknown","worst_case":"Attacker runs code on the ColdFusion server remotely","analyst_note":"Find affected ColdFusion build ranges and the fixed updates in the Adobe security bulletin for CVE-2018-4939, and any detection guidance.","how_to_check":"unknown","needs_analyst":true,"not_affected_if":["managed-hosting"],"user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"critical"},"cost_usd":0.000457,"input_tokens":2826,"output_tokens":349,"severity_before":"unknown"},"analyst_status":"queued","analyst_note":"Find affected ColdFusion build ranges and the fixed updates in the Adobe security bulletin for CVE-2018-4939, and any detection guidance.","search":"'-2018':11A,14A '-4939':12A,15A '11':68C '13':70C '5':63C 'adob':1A,3A,25B,60C 'adobe':16A 'arbitrari':87C 'attack':42B 'check':31B 'cisa':52B 'code':37B,48B,88C 'coldfus':2A,4A,18B,26B,61C,67C 'coldfusion':17A 'could':84C 'craft':34B 'cve':10A,13A 'data':8A,29B,80C 'deseri':5A,27B,77C 'earlier':65C,72C 'execut':49B,89C 'exploit':19B,56B,76C,83C 'get':47B 'host':23B 'lead':85C 'let':32B 'list':53B 'reach':44B 'request':35B 'run':36B 'runtim':20B 'self':22B 'self-host':21B 'server':40B,46B 'success':82C 'untrust':7A,28B,79C 'updat':62C,69C 'version':66C,73C 'vulner':9A,81C 'wild':59B 'window':24B 'without':30B","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2018-05-19T17:29:01+00:00","kev":{"dateAdded":"2021-11-03","dueDate":"2022-05-03","requiredAction":"Apply updates per vendor instructions.","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-2018-4939","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2018-4939","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":"2026-10-25T13:39:32+00:00","note":null},{"source":"epss","external_id":"CVE-2018-4939","url":"https://api.first.org/data/v1/epss?cve=CVE-2018-4939","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-2018-4939","url":"https://nvd.nist.gov/vuln/detail/CVE-2018-4939","severity":null,"published_at":"2018-05-19T17:29:01+00:00","modified_at":"2026-06-17T01:59:19+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"}