{"id":"CVE-2026-91423","kind":"vulnerability","aliases":["CVE-2026-91423"],"related":[],"title":"Oracle Siebel CRM Deployment: local high-privilege flaw exposes CRM 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 high 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 creation, deletion or modification access to critical data or all Siebel CRM Deployment accessible data as well as  unauthorized access to critical data or complete access to all Siebel CRM Deployment accessible data. CVSS 3.1 Base Score 6.0 (Confidentiality and Integrity impacts).  CVSS Vector: (CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N).","summary":"Oracle Siebel CRM Deployment, in the Server Infrastructure component, has a flaw affecting supported versions 17.0 through 26.9. An attacker who already holds high privileges and logon on the host where Siebel CRM Deployment runs can create, change, delete or read critical CRM data.","severity":"medium","cvss":6.0,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["on-premises","oracle","self-hosted","siebel-crm","vendor"],"not_affected_if":["managed-hosting","outside-affected-versions"],"how_to_check":"- Check the installed Siebel CRM Deployment version against the affected range 17.0-26.9 in the Oracle Siebel documentation\n- unknown","fix":"- Apply the Oracle Critical Patch Update fix for Siebel CRM Deployment; the fixed version is unknown from the sources","status":"open","published_at":"2026-10-20T22:20:45+00:00","first_seen_at":"2026-10-23T21:57:26+00:00","triaged_at":"2026-10-25T04:05:38+00:00","updated_at":"2026-10-25T04:05:38+00:00","category":"vendor","confidence":0.7,"triage":{"at":"2026-10-25T04:05:38Z","model":"claude-haiku-5-5","output":{"fix":"- Apply the Oracle Critical Patch Update fix for Siebel CRM Deployment; the fixed version is unknown from the sources","reach":"local","title":"Oracle Siebel CRM Deployment: local high-privilege flaw exposes CRM data","impact":"medium","summary":"Oracle Siebel CRM Deployment, in the Server Infrastructure component, has a flaw affecting supported versions 17.0 through 26.9. An attacker who already holds high privileges and logon on the host where Siebel CRM Deployment runs can create, change, delete or read critical CRM data.","category":"vendor","nicknames":[],"who_cares":["siebel-crm","oracle","self-hosted","on-premises"],"confidence":0.7,"needs_auth":"yes","worst_case":"Attacker with host logon reads, changes or deletes critical CRM data","analyst_note":"Confirm the patched Siebel CRM Deployment version and the Oracle CPU advisory link for affected 17.0-26.9 builds.","how_to_check":"- Check the installed Siebel CRM Deployment version against the affected range 17.0-26.9 in the Oracle Siebel documentation\n- unknown","needs_analyst":true,"not_affected_if":["managed-hosting","outside-affected-versions"],"who_is_affected":"Teams that run Oracle Siebel CRM Deployment on-premises on versions 17.0 through 26.9 are in scope. The attacker needs high privileges and logon to the infrastructure where the deployment runs, so exposure is limited to insiders or an attacker who already has host access. Teams on managed Oracle hosting or outside the affected version range can skip it.","user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"medium"},"cost_usd":0.00066,"input_tokens":3528,"output_tokens":614,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-2026':14A,17A '-26.9':95C '-91423':15A,18A '/av':173C '17.0':45B,94C '26.9':47B '3.1':161C,172C '6.0':164C 'access':131C,140C,146C,152C,158C 'affect':42B,92C 'allow':99C 'alreadi':51B 'attack':49B,102C,119C 'base':162C 'chang':67B 'complet':151C 'compon':38B,85C 'compromis':114C 'confidenti':165C 'creat':66B 'creation':127C 'critic':71B,133C,148C 'crm':3A,11A,28B,32B,62B,72B,78C,84C,110C,116C,138C,156C 'cve':13A,16A 'cvss':160C,169C,171C 'data':12A,73B,134C,141C,149C,159C 'delet':68B,128C 'deploy':4A,33B,63B,79C,111C,117C,139C,157C 'easili':96C 'execut':112C 'exploit':97C 'expos':10A 'flaw':9A,41B 'h/a':180C 'h/i':179C 'h/ui':176C 'high':7A,53B,100C 'high-privileg':6A 'hold':52B 'host':25B,59B 'impact':168C 'infrastructur':37B,87C,107C 'integr':167C 'l/ac':174C 'l/pr':175C 'local':5A 'logon':56B,104C 'modif':130C 'n':181C 'n/s':177C 'on-premis':19B 'oracl':1A,22B,30B,82C 'premis':21B 'privileg':8A,54B,101C 'product':80C 'read':70B 'result':124C 'run':64B 'score':163C 'self':24B 'self-host':23B 'server':36B,86C 'siebel':2A,27B,31B,61B,77C,83C,109C,115C,137C,155C 'siebel-crm':26B 'success':118C 'support':43B,88C 'u/c':178C 'unauthor':126C,145C 'vector':170C 'vendor':29B 'version':44B,89C 'vulner':74C,98C,122C 'well':143C","nicknames":[],"mitigations":[],"who_affected":"Teams that run Oracle Siebel CRM Deployment on-premises on versions 17.0 through 26.9 are in scope. The attacker needs high privileges and logon to the infrastructure where the deployment runs, so exposure is limited to insiders or an attacker who already has host access. Teams on managed Oracle hosting or outside the affected version range can skip it.","tier":"C","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-20T22:20:45+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N","cvss_by":"secalert_us@oracle.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-91423","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-91423","severity":null,"published_at":"2026-10-20T22:20:45+00:00","modified_at":"2026-10-23T21:17:26+00:00","first_seen_at":"2026-10-23T21:57:26+00:00","fetched_at":"2026-10-23T22:29:00+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"}