{"id":"CVE-2026-20291","kind":"vulnerability","aliases":["CVE-2026-20291"],"related":[],"title":"Snort 3: privilege management flaws let local users gain higher rights","description":"As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco owned Open Source Snort 3 Software engineering team has conducted a comprehensive internal security review. This review resulted in software hardening releases that address multiple internally discovered vulnerabilities.\r\n\r\nThe vulnerabilities tracked by CVE-2026-20291 are related to issues concerning improper privilege management that are grouped under the Common Weakness Enumeration (CWE) Base CWE-269.","summary":"Cisco's internal review of Snort 3 found several improper privilege management flaws (CWE-269) and fixed them in hardening releases. The sources do not say exactly what an attacker gets, but the weakness class lets a process or user act with rights it should not have.","severity":"high","cvss":7.8,"epss":0.00121,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["cisco","network-ids","package","snort"],"not_affected_if":[],"how_to_check":"- unknown","fix":"- Move Snort 3 to a hardened release from Cisco's advisory, version unknown from the sources","status":"open","published_at":"2026-10-21T17:18:28+00:00","first_seen_at":"2026-10-23T21:57:29+00:00","triaged_at":"2026-10-25T03:08:23+00:00","updated_at":"2026-10-25T03:08:23+00:00","category":"package","confidence":0.3,"triage":{"at":"2026-10-25T03:08:23Z","model":"claude-haiku-5-5","output":{"fix":"- Move Snort 3 to a hardened release from Cisco's advisory, version unknown from the sources","reach":"unknown","title":"Snort 3: privilege management flaws let local users gain higher rights","impact":"medium","summary":"Cisco's internal review of Snort 3 found several improper privilege management flaws (CWE-269) and fixed them in hardening releases. The sources do not say exactly what an attacker gets, but the weakness class lets a process or user act with rights it should not have.","category":"package","nicknames":[],"who_cares":["snort","cisco","network-ids"],"confidence":0.3,"needs_auth":"unknown","worst_case":"unknown privilege escalation on hosts running Snort 3","analyst_note":"Pull the Cisco advisory for CVE-2026-20291 to get affected and fixed Snort 3 versions, the attack vector, and required privileges.","how_to_check":"- unknown","needs_analyst":true,"not_affected_if":[],"who_is_affected":"unknown","user_interaction":"unknown","needs_special_setup":"unknown","severity_if_unknown":"unknown"},"cost_usd":0.000538,"input_tokens":3422,"output_tokens":391,"severity_before":"high"},"analyst_status":null,"analyst_note":null,"search":"'-2026':13A,16A,115C '-20291':14A,17A,116C '-269':38B,136C '3':2A,30B,86C 'act':64B 'address':105C 'attack':53B 'base':134C 'cisco':18B,24B,70C,81C 'class':58B 'commit':73C 'common':130C 'comprehens':93C 'concern':121C 'conduct':91C 'cve':12A,15A,114C 'cwe':37B,133C,135C 'discov':108C 'engin':88C 'enumer':132C 'exact':50B 'fix':40B 'flaw':5A,36B 'found':31B 'gain':9A 'get':54B 'group':127C 'harden':43B,102C 'higher':10A 'id':21B 'improp':33B,122C 'intern':26B,94C,107C 'issu':120C 'let':6A,59B 'local':7A 'manag':4A,35B,124C 'multipl':106C 'network':20B 'network-id':19B 'ongo':72C 'open':83C 'own':82C 'packag':22B 'part':68C 'privileg':3A,34B,123C 'proactiv':75C 'process':61B 'product':78C 'qualiti':79C 'relat':118C 'releas':44B,103C 'result':99C 'review':27B,96C,98C 'right':11A,66B 'say':49B 'secur':76C,95C 'sever':32B 'snort':1A,23B,29B,85C 'softwar':87C,101C 'sourc':46B,84C 'team':89C 'track':112C 'user':8A,63B 'vulner':109C,111C 'weak':57B,131C","nicknames":[],"mitigations":[],"who_affected":null,"tier":"B","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-21T17:18:28+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cvss_by":"psirt@cisco.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-20291","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-20291","severity":null,"published_at":"2026-10-21T17:18:28+00:00","modified_at":"2026-10-22T23:18:31+00:00","first_seen_at":"2026-10-23T21:57:29+00:00","fetched_at":"2026-10-23T22:29:01+00:00","note":null},{"source":"epss","external_id":"CVE-2026-20291","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-20291","severity":null,"published_at":null,"modified_at":null,"first_seen_at":"2026-10-24T13:15:54+00:00","fetched_at":"2026-10-24T13:15:54+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"}