{"id":"CVE-2026-91439","kind":"vulnerability","aliases":["CVE-2026-91439"],"related":[],"title":"Oracle Siebel CRM Deployment: low-privileged local user reads critical data","description":"Vulnerability in the Siebel CRM Deployment product of Oracle Siebel CRM (component: Server Infrastructure).  Supported versions that are affected are 17.0-26.9. Easily exploitable vulnerability allows low privileged attacker with logon to the infrastructure where Siebel CRM Deployment executes to compromise Siebel CRM Deployment.  Successful attacks of this vulnerability can result in  unauthorized access to critical data or complete access to all Siebel CRM Deployment accessible data. CVSS 3.1 Base Score 5.5 (Confidentiality impacts).  CVSS Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N).","summary":"Oracle Siebel CRM Deployment, Server Infrastructure component, has a flaw that lets an attacker with logon to the host where it runs compromise the deployment. A successful attack gives unauthorized access to critical data held by Siebel CRM Deployment.","severity":"medium","cvss":5.5,"epss":0.00133,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["on-prem","oracle","siebel-crm","vendor"],"not_affected_if":["version-outside-17.0-26.9"],"how_to_check":"- Confirm the Siebel CRM Deployment version in use; the sources say versions 17.0 through 26.9 are affected\n- unknown for other checks, the sources do not say how to inspect the deployment","fix":"- Apply the Oracle Siebel CRM Critical Patch Update for the affected release; the sources do not name the fixed version\n- unknown for other actions, the sources do not say","status":"open","published_at":"2026-10-20T22:20:47+00:00","first_seen_at":"2026-10-23T21:57:26+00:00","triaged_at":"2026-10-25T04:12:04+00:00","updated_at":"2026-10-25T12:38:52+00:00","category":"vendor","confidence":0.6,"triage":{"at":"2026-10-25T04:12:04Z","model":"claude-haiku-5-5","output":{"fix":"- Apply the Oracle Siebel CRM Critical Patch Update for the affected release; the sources do not name the fixed version\n- unknown for other actions, the sources do not say","reach":"local","title":"Oracle Siebel CRM Deployment: low-privileged local user reads critical data","impact":"medium","summary":"Oracle Siebel CRM Deployment, Server Infrastructure component, has a flaw that lets an attacker with logon to the host where it runs compromise the deployment. A successful attack gives unauthorized access to critical data held by Siebel CRM Deployment.","category":"vendor","nicknames":[],"who_cares":["oracle","siebel-crm","on-prem"],"confidence":0.6,"needs_auth":"yes","worst_case":"Attacker reads critical data across Siebel CRM Deployment accessible data","analyst_note":"Check Oracle's Siebel CRM security alert for the fixed patch version and the exact affected components; sources give only the NVD summary.","how_to_check":"- Confirm the Siebel CRM Deployment version in use; the sources say versions 17.0 through 26.9 are affected\n- unknown for other checks, the sources do not say how to inspect the deployment","needs_analyst":true,"not_affected_if":["version-outside-17.0-26.9"],"who_is_affected":"Teams running Oracle Siebel CRM Deployment in the 17.0 to 26.9 supported version range, where users with logon to the server infrastructure can reach the product. Deployments outside that range, or where no one can log on to the host, are less exposed. unknown for finer detail.","user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"medium"},"cost_usd":0.000643,"input_tokens":3483,"output_tokens":589,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-2026':14A,17A '-26.9':87C '-91439':15A,18A '/av':144C '17.0':86C '3.1':134C,143C '5.5':137C 'access':57B,119C,125C,131C 'affect':84C 'allow':91C 'attack':40B,54B,94C,111C 'base':135C 'complet':124C 'compon':33B,77C 'compromis':49B,106C 'confidenti':138C 'critic':11A,59B,121C 'crm':3A,25B,29B,64B,70C,76C,102C,108C,129C 'cve':13A,16A 'cvss':133C,140C,142C 'data':12A,60B,122C,132C 'deploy':4A,30B,51B,65B,71C,103C,109C,130C 'easili':88C 'execut':104C 'exploit':89C 'flaw':36B 'give':55B 'h/i':150C 'held':61B 'host':45B 'impact':139C 'infrastructur':32B,79C,99C 'l/ac':145C 'l/pr':146C 'l/ui':147C 'let':38B 'local':8A 'logon':42B,96C 'low':6A,92C 'low-privileg':5A 'n':152C 'n/a':151C 'n/s':148C 'on-prem':19B 'oracl':1A,22B,27B,74C 'prem':21B 'privileg':7A,93C 'product':72C 'read':10A 'result':116C 'run':48B 'score':136C 'server':31B,78C 'siebel':2A,24B,28B,63B,69C,75C,101C,107C,128C 'siebel-crm':23B 'success':53B,110C 'support':80C 'u/c':149C 'unauthor':56B,118C 'user':9A 'vector':141C 'vendor':26B 'version':81C 'vulner':66C,90C,114C","nicknames":[],"mitigations":[],"who_affected":"Teams running Oracle Siebel CRM Deployment in the 17.0 to 26.9 supported version range, where users with logon to the server infrastructure can reach the product. Deployments outside that range, or where no one can log on to the host, are less exposed. unknown for finer detail.","tier":"C","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-20T22:20:47+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","cvss_by":"secalert_us@oracle.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-91439","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-91439","severity":null,"published_at":"2026-10-20T22:20:47+00:00","modified_at":"2026-10-23T21:17:27+00:00","first_seen_at":"2026-10-23T21:57:26+00:00","fetched_at":"2026-10-23T22:29:00+00:00","note":null},{"source":"epss","external_id":"CVE-2026-91439","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-91439","severity":null,"published_at":null,"modified_at":null,"first_seen_at":"2026-10-25T12:38:52+00:00","fetched_at":"2026-10-25T12:38:52+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"}