{"id":"CVE-2026-101986","published":"2026-10-14T17:17:50Z","modified":"2026-10-30T18:45:31Z","title":"An Improper Authentication vulnerability in J-Web of Juniper Networks Junos OS and Junos OS Evolved allows an…","vendor":"Juniper Networks","product":"Junos OS","tier":"core","eol":null,"description":{"text":"An  Improper Authentication vulnerability in J-Web of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated network attacker to bypass J-Web authentication and execute CGI content with elevated privileges via a crafted HTTP request.","provenance":"source","from":"NVD"},"summary":{"text":"The flaw is an improper authentication weakness in J-Web, the web management interface of Juniper Networks Junos OS and Junos OS Evolved. An unauthenticated attacker with network access can send a crafted HTTP request to bypass J-Web authentication and run CGI content with elevated privileges, with no user interaction or prior credentials required.","provenance":"ai","model":"claude-haiku-5-5","generatedAt":"2026-10-23T07:17:56Z"},"cvss":{"score":9.8,"severity":"CRITICAL","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","provenance":"source","from":"NVD"},"epss":{"score":0.00549,"percentile":0.46003,"date":"2026-10-31","provenance":"source"},"kev":null,"vulncheckKev":null,"exploited":false,"otx":null,"cwes":[{"id":"CWE-287","name":"Improper Authentication"}],"references":[{"url":"https://supportportal.juniper.net/JSA112187","tags":["Vendor Advisory"]}],"techniques":[],"reports":[],"affected":[],"advisories":[],"euvd":{"id":"EUVD-2026-101450","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-101450","exploited":false,"exploitedSince":null,"provenance":"source"},"exploits":[],"exploitSources":null,"exploitRefs":[],"flow":[],"timeline":[{"date":"2026-10-14","kind":"published","label":"Published (NVD)","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-101986","provenance":"source"}],"speed":{"daysToPublicExploit":null,"firstExploitFrom":null,"daysToKev":null},"priority":{"score":16.1,"factors":[{"name":"In a KEV catalog","points":0.0,"detail":"not listed"},{"name":"Recent KEV listing","points":0.0,"detail":"not listed"},{"name":"Known ransomware use","points":0.0,"detail":"not known"},{"name":"EPSS percentile","points":9.2,"detail":"percentile 0.4600"},{"name":"Named in threat reports","points":0.0,"detail":"0 reports"},{"name":"Public exploit code","points":0.0,"detail":"none found"},{"name":"Mentioned in OTX pulses","points":0.0,"detail":"0 pulses"},{"name":"CVSS severity","points":6.86,"detail":"base score 9.8"},{"name":"End-of-life product","points":0.0,"detail":"supported or unknown"}]}}