{"id":"CVE-2015-7755","kind":"vulnerability","aliases":["CVE-2015-7755"],"related":[],"title":"Juniper ScreenOS 6.2.0r15 through 6.2.0r18, 6.3.0r12 before 6.3.0r12b, 6.3.0r13 before 6.3.0r13b, 6.3.0r14 before…","description":"Juniper ScreenOS 6.2.0r15 through 6.2.0r18, 6.3.0r12 before 6.3.0r12b, 6.3.0r13 before 6.3.0r13b, 6.3.0r14 before 6.3.0r14b, 6.3.0r15 before 6.3.0r15b, 6.3.0r16 before 6.3.0r16b, 6.3.0r17 before 6.3.0r17b, 6.3.0r18 before 6.3.0r18b, 6.3.0r19 before 6.3.0r19b, and 6.3.0r20 before 6.3.0r21 allows remote attackers to obtain administrative access by entering an unspecified password during a (1) SSH or (2) TELNET session.","summary":"Juniper ScreenOS firewalls contain an improper authentication flaw that lets an unauthenticated remote attacker gain administrative access to the device. CISA lists it as actively exploited in the wild.","severity":"critical","cvss":10.0,"epss":null,"exploited":true,"exploited_at":"2025-10-02T00:00:00+00:00","products":[{"name":"Juniper ScreenOS","fixed":[],"affected":"","ecosystem":"vendor"},{"name":"juniper screenos","fixed":[],"affected":"= 6.3.0","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["exploited","firewall","infrastructure","juniper","network-appliance","screenos"],"not_affected_if":["no-screenos-devices"],"how_to_check":"Identify ScreenOS devices on the network and confirm their firmware version against Juniper's advisory; unknown whether the sources list affected versions.","fix":"Apply the vendor mitigations or patch per Juniper's advisory; if no mitigation exists, discontinue use of the product as CISA directs.","status":"open","published_at":"2015-12-19T14:59:01+00:00","first_seen_at":"2026-10-23T19:11:51+00:00","triaged_at":"2026-10-23T20:44:44+00:00","updated_at":"2026-10-23T23:44:51+00:00","category":"infrastructure","confidence":0.7,"triage":{"at":"2026-10-23T20:44:44Z","model":"claude-haiku-5-5","output":{"fix":"Apply the vendor mitigations or patch per Juniper's advisory; if no mitigation exists, discontinue use of the product as CISA directs.","reach":"internet","summary":"Juniper ScreenOS firewalls contain an improper authentication flaw that lets an unauthenticated remote attacker gain administrative access to the device. CISA lists it as actively exploited in the wild.","category":"infrastructure","who_cares":["juniper","screenos","firewall","network-appliance"],"confidence":0.7,"needs_auth":"no","worst_case":"Attacker gets unauthorized administrative control of the firewall remotely.","analyst_note":"Find Juniper's advisory for CVE-2015-7755 to get affected and fixed ScreenOS versions and the exact mitigation; the sources provide neither.","how_to_check":"Identify ScreenOS devices on the network and confirm their firmware version against Juniper's advisory; unknown whether the sources list affected versions.","needs_analyst":true,"not_affected_if":["no-screenos-devices"],"user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.000452,"input_tokens":2524,"output_tokens":400,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-2015':21A,24A '-7755':22A,25A '1':134C '2':137C '6.2.0':3A,6A,69C,72C '6.3.0':8A,11A,13A,16A,18A,74C,77C,79C,82C,84C,87C,89C,92C,94C,97C,99C,102C,104C,107C,109C,112C,115C,118C 'access':54B,126C 'activ':62B 'administr':53B,125C 'allow':120C 'applianc':36B 'attack':51B,122C 'authent':44B 'cisa':58B 'contain':41B 'cve':20A,23A 'devic':57B 'enter':128C 'exploit':30B,63B 'firewal':31B,40B 'flaw':45B 'gain':52B 'improp':43B 'infrastructur':32B 'junip':1A,33B,38B,67C 'juniper':26A,28A 'let':47B 'list':59B 'network':35B 'network-appli':34B 'obtain':124C 'password':131C 'r12':9A,75C 'r12b':12A,78C 'r13':14A,80C 'r13b':17A,83C 'r14':19A,85C 'r14b':88C 'r15':4A,70C,90C 'r15b':93C 'r16':95C 'r16b':98C 'r17':100C 'r17b':103C 'r18':7A,73C,105C 'r18b':108C 'r19':110C 'r19b':113C 'r20':116C 'r21':119C 'remot':50B,121C 'screeno':2A,37B,39B,68C 'screenos':27A,29A 'session':139C 'ssh':135C 'telnet':138C 'unauthent':49B 'unspecifi':130C 'wild':66B","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2015-12-19T14:59:01+00:00","kev":{"dateAdded":"2025-10-02","dueDate":"2025-10-23","requiredAction":"Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.","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-2015-7755","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2015-7755","severity":null,"published_at":"2025-10-02T00:00:00+00:00","modified_at":null,"first_seen_at":"2026-10-23T19:11:51+00:00","fetched_at":"2026-10-25T11:39:14+00:00","note":null},{"source":"nvd","external_id":"CVE-2015-7755","url":"https://nvd.nist.gov/vuln/detail/CVE-2015-7755","severity":null,"published_at":"2015-12-19T14:59:01+00:00","modified_at":"2026-06-17T00:33:04+00:00","first_seen_at":"2026-10-23T23:44:51+00:00","fetched_at":"2026-10-23T23:44:51+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"}