{"id":"CVE-2026-91364","kind":"vulnerability","aliases":["CVE-2026-91364"],"related":[],"title":"Oracle Siebel CRM Cloud: adjacent-network attacker can alter and read data","description":"Vulnerability in the Siebel CRM Cloud Applications product of Oracle Siebel CRM (component: Siebel Cloud Manager).  Supported versions that are affected are 22.3-26.9. Difficult to exploit vulnerability allows unauthenticated attacker with access to the physical communication segment attached to the hardware where the Siebel CRM Cloud Applications executes to compromise Siebel CRM Cloud Applications.  Successful attacks of this vulnerability can result in  unauthorized creation, deletion or modification access to critical data or all Siebel CRM Cloud Applications accessible data as well as  unauthorized access to critical data or complete access to all Siebel CRM Cloud Applications accessible data. CVSS 3.1 Base Score 6.8 (Confidentiality and Integrity impacts).  CVSS Vector: (CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N).","summary":"Oracle Siebel CRM Cloud Applications, versions 22.3 through 26.9, contain a flaw in the Siebel Cloud Manager component. An unauthenticated attacker on the physical communication segment attached to the hardware can create, modify, delete or read critical data in the application.","severity":"medium","cvss":6.8,"epss":0.00182,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["enterprise-crm","oracle","siebel-crm","vendor"],"not_affected_if":["no-shared-network-segment","outside-affected-version-range"],"how_to_check":"- Confirm whether your deployment is a Siebel CRM Cloud Applications release in the range 22.3 to 26.9 (unknown which exact build check command applies)\n- Check with Oracle's advisory for the affected component: Siebel Cloud Manager","fix":"- Apply the Oracle Critical Patch Update fix for Siebel CRM Cloud Applications (the patched version is unknown from the sources)\n- Restrict access to the network segment carrying Siebel host traffic until patched","status":"open","published_at":"2026-10-20T22:20:39+00:00","first_seen_at":"2026-10-23T21:57:26+00:00","triaged_at":"2026-10-25T03:43:04+00:00","updated_at":"2026-10-25T12:38:52+00:00","category":"vendor","confidence":0.6,"triage":{"at":"2026-10-25T03:43:04Z","model":"claude-haiku-5-5","output":{"fix":"- Apply the Oracle Critical Patch Update fix for Siebel CRM Cloud Applications (the patched version is unknown from the sources)\n- Restrict access to the network segment carrying Siebel host traffic until patched","reach":"network","title":"Oracle Siebel CRM Cloud: adjacent-network attacker can alter and read data","impact":"high","summary":"Oracle Siebel CRM Cloud Applications, versions 22.3 through 26.9, contain a flaw in the Siebel Cloud Manager component. An unauthenticated attacker on the physical communication segment attached to the hardware can create, modify, delete or read critical data in the application.","category":"vendor","nicknames":[],"who_cares":["siebel-crm","oracle","enterprise-crm"],"confidence":0.6,"needs_auth":"no","worst_case":"Attacker reads and modifies critical CRM data on the segment.","analyst_note":"Check Oracle's Critical Patch Update advisory for the fixed Siebel Cloud Manager version and the exact affected build list.","how_to_check":"- Confirm whether your deployment is a Siebel CRM Cloud Applications release in the range 22.3 to 26.9 (unknown which exact build check command applies)\n- Check with Oracle's advisory for the affected component: Siebel Cloud Manager","needs_analyst":true,"not_affected_if":["outside-affected-version-range","no-shared-network-segment"],"who_is_affected":"Organisations running Oracle Siebel CRM Cloud Applications in the affected version range. Exposure depends on an attacker having access to the physical or adjacent network segment attached to the hardware that runs the application, so it is mainly a concern for hosts reachable from shared or untrusted network segments. Teams using only Oracle-hosted SaaS with no direct access to the underlying segment can likely skip urgent action, but this is not confirmed by the sources.","user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"medium"},"cost_usd":0.000705,"input_tokens":3563,"output_tokens":697,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-2026':15A,18A '-26.9':92C '-91364':16A,19A '/av':181C '22.3':34B,91C '26.9':36B '3.1':169C,180C '6.8':172C 'a/ac':182C 'access':101C,137C,147C,153C,159C,166C 'adjac':6A 'adjacent-network':5A 'affect':89C 'allow':97C 'alter':10A 'applic':32B,68B,75C,116C,123C,146C,165C 'attach':54B,107C 'attack':8A,48B,99C,125C 'base':170C 'cloud':4A,31B,43B,74C,83C,115C,122C,145C,164C 'communic':52B,105C 'complet':158C 'compon':45B,81C 'compromis':119C 'confidenti':173C 'contain':37B 'creat':59B 'creation':133C 'critic':64B,139C,155C 'crm':3A,22B,26B,30B,73C,80C,114C,121C,144C,163C 'cve':14A,17A 'cvss':168C,177C,179C 'data':13A,65B,140C,148C,156C,167C 'delet':61B,134C 'difficult':93C 'enterpris':21B 'enterprise-crm':20B 'execut':117C 'exploit':95C 'flaw':39B 'h/a':188C 'h/i':187C 'h/pr':183C 'hardwar':57B,110C 'impact':176C 'integr':175C 'manag':44B,84C 'modif':136C 'modifi':60B 'n':189C 'n/s':185C 'n/ui':184C 'network':7A 'oracl':1A,23B,28B,78C 'physic':51B,104C 'product':76C 'read':12A,63B 'result':130C 'score':171C 'segment':53B,106C 'siebel':2A,25B,29B,42B,72C,79C,82C,113C,120C,143C,162C 'siebel-crm':24B 'success':124C 'support':85C 'u/c':186C 'unauthent':47B,98C 'unauthor':132C,152C 'vector':178C 'vendor':27B 'version':33B,86C 'vulner':69C,96C,128C 'well':150C","nicknames":[],"mitigations":[],"who_affected":"Organisations running Oracle Siebel CRM Cloud Applications in the affected version range. Exposure depends on an attacker having access to the physical or adjacent network segment attached to the hardware that runs the application, so it is mainly a concern for hosts reachable from shared or untrusted network segments. Teams using only Oracle-hosted SaaS with no direct access to the underlying segment can likely skip urgent action, but this is not confirmed by the sources.","tier":"C","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-20T22:20:39+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:A/AC:H/PR:N/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-2026-91364","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-91364","severity":null,"published_at":"2026-10-20T22:20:39+00:00","modified_at":"2026-10-21T18:45:11+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-2026-91364","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-91364","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"}