{"id":"CVE-2018-0147","kind":"vulnerability","aliases":["CVE-2018-0147"],"related":[],"title":"Cisco Secure Access Control System (ACS): Cisco Secure Access Control System Java Deserialization Vulnerability","description":"A vulnerability in Java deserialization used by Cisco Secure Access Control System (ACS) prior to release 5.8 patch 9 could allow an unauthenticated, remote attacker to execute arbitrary commands on an affected device. The vulnerability is due to insecure deserialization of user-supplied content by the affected software. An attacker could exploit this vulnerability by sending a crafted serialized Java object. An exploit could allow the attacker to execute arbitrary commands on the device with root privileges. Cisco Bug IDs: CSCvh25988.","summary":"Cisco Secure Access Control System (ACS) unsafely deserializes Java objects supplied by users. An unauthenticated remote attacker can run arbitrary commands on the affected device.","severity":"critical","cvss":10.0,"epss":0.18212,"exploited":true,"exploited_at":"2022-03-25T00:00:00+00:00","products":[{"name":"Cisco Secure Access Control System (ACS)","fixed":[],"affected":"","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["acs","cisco","exploited","infrastructure","network-appliance"],"not_affected_if":["acs-not-deployed"],"how_to_check":"Identify ACS appliances or instances in use and compare their version against the Cisco advisory. unknown","fix":"Apply the update per Cisco's vendor instructions; CISA requires updates per vendor instructions. unknown","status":"open","published_at":"2018-03-08T07:29:00+00:00","first_seen_at":"2026-10-23T19:11:52+00:00","triaged_at":"2026-10-23T21:20:14+00:00","updated_at":"2026-10-23T21:57:35+00:00","category":"infrastructure","confidence":0.7,"triage":{"at":"2026-10-23T21:20:14Z","model":"claude-haiku-5-5","output":{"fix":"Apply the update per Cisco's vendor instructions; CISA requires updates per vendor instructions. unknown","reach":"internet","impact":"high","summary":"Cisco Secure Access Control System (ACS) unsafely deserializes Java objects supplied by users. An unauthenticated remote attacker can run arbitrary commands on the affected device.","category":"infrastructure","who_cares":["cisco","acs","network-appliance"],"confidence":0.7,"needs_auth":"no","worst_case":"Attacker runs arbitrary commands on the ACS device remotely.","analyst_note":"Find the Cisco advisory and the affected/fixed ACS versions; the sources do not name them. Known exploited per CISA KEV.","how_to_check":"Identify ACS appliances or instances in use and compare their version against the Cisco advisory. unknown","needs_analyst":true,"not_affected_if":["acs-not-deployed"],"user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"critical"},"cost_usd":0.000469,"input_tokens":2891,"output_tokens":360,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-0147':17A,20A '-2018':16A,19A '5.8':75C '9':77C 'ac':6A,27B,39B,71C 'access':3A,9A,23A,36B,68C 'acs':26A 'affect':57B,90C,106C 'allow':79C,124C 'applianc':33B 'arbitrari':53B,86C,129C 'attack':50B,83C,109C,126C 'bug':138C 'cisco':1A,7A,21A,28B,34B,66C,137C 'command':54B,87C,130C 'content':103C 'control':4A,10A,24A,37B,69C 'could':78C,110C,123C 'craft':117C 'cscvh25988':140C 'cve':15A,18A 'deseri':13A,41B,63C,98C 'devic':58B,91C,133C 'due':95C 'execut':85C,128C 'exploit':29B,111C,122C 'id':139C 'infrastructur':30B 'insecur':97C 'java':12A,42B,62C,119C 'network':32B 'network-appli':31B 'object':43B,120C 'patch':76C 'prior':72C 'privileg':136C 'releas':74C 'remot':49B,82C 'root':135C 'run':52B 'secur':2A,8A,35B,67C 'secure':22A 'send':115C 'serial':118C 'softwar':107C 'suppli':44B,102C 'system':5A,11A,25A,38B,70C 'unauthent':48B,81C 'unsaf':40B 'use':64C 'user':46B,101C 'user-suppli':100C 'vulner':14A,60C,93C,113C","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2018-03-08T07:29:00+00:00","kev":{"dateAdded":"2022-03-25","dueDate":"2022-04-15","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-2018-0147","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2018-0147","severity":null,"published_at":"2022-03-25T00:00:00+00:00","modified_at":null,"first_seen_at":"2026-10-23T19:11:52+00:00","fetched_at":"2026-10-25T13:39:32+00:00","note":null},{"source":"epss","external_id":"CVE-2018-0147","url":"https://api.first.org/data/v1/epss?cve=CVE-2018-0147","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-2018-0147","url":"https://nvd.nist.gov/vuln/detail/CVE-2018-0147","severity":null,"published_at":"2018-03-08T07:29:00+00:00","modified_at":"2026-06-17T01:29:56+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"}