{"id":"CVE-2026-91348","kind":"vulnerability","aliases":["CVE-2026-91348"],"related":[],"title":"Oracle Solaris Utility flaw lets a local user take over the system","description":"Vulnerability in the Oracle Solaris product of Oracle Systems (component: Utility).  Supported versions that are affected are 11.3 and  11.4. Easily exploitable vulnerability allows unauthenticated attacker with logon to the infrastructure where Oracle Solaris executes to compromise Oracle Solaris.  Successful attacks of this vulnerability can result in takeover of Oracle Solaris. CVSS 3.1 Base Score 8.4 (Confidentiality, Integrity and Availability impacts).  CVSS Vector: (CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).","summary":"A flaw in the Utility component of Oracle Solaris 11.3 and 11.4 lets an attacker who already has a logon on the machine compromise the operating system. Per the CVSS vector, no user interaction or privileges are needed beyond local access, and a successful attack gives full takeover.","severity":"high","cvss":8.4,"epss":0.00129,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["infrastructure","on-prem","oracle-solaris","shared-hosts","solaris"],"not_affected_if":["no-untrusted-local-logons","other-os"],"how_to_check":"- Run `uname -v` or `pkg info entire` to see the Solaris release, and compare it with the fixed level in Oracle's advisory.\n- Check whether the system is running Solaris 11.3 or 11.4 at all; releases outside those lines are not listed as affected.","fix":"- Apply the Oracle Critical Patch Update fix for Solaris 11.3 and 11.4 (`pkg update` on a system with the Oracle support repository configured), then reboot.\n- Exact fixed package versions: unknown; the sources do not list them.","status":"open","published_at":"2026-10-20T22:20:37+00:00","first_seen_at":"2026-10-23T21:57:26+00:00","triaged_at":"2026-10-25T03:01:48+00:00","updated_at":"2026-10-25T12:38:52+00:00","category":"infrastructure","confidence":0.6,"triage":{"at":"2026-10-25T03:01:48Z","model":"claude-haiku-5-5","output":{"fix":"- Apply the Oracle Critical Patch Update fix for Solaris 11.3 and 11.4 (`pkg update` on a system with the Oracle support repository configured), then reboot.\n- Exact fixed package versions: unknown; the sources do not list them.","reach":"local","title":"Oracle Solaris Utility flaw lets a local user take over the system","impact":"high","summary":"A flaw in the Utility component of Oracle Solaris 11.3 and 11.4 lets an attacker who already has a logon on the machine compromise the operating system. Per the CVSS vector, no user interaction or privileges are needed beyond local access, and a successful attack gives full takeover.","category":"infrastructure","nicknames":[],"who_cares":["solaris","oracle-solaris","on-prem","shared-hosts"],"confidence":0.6,"needs_auth":"yes","worst_case":"Attacker takes over the Solaris system after a local logon","analyst_note":"Find Oracle's Solaris CPU advisory for CVE-2026-91348 to get the fixed package versions and confirm the affected releases.","how_to_check":"- Run `uname -v` or `pkg info entire` to see the Solaris release, and compare it with the fixed level in Oracle's advisory.\n- Check whether the system is running Solaris 11.3 or 11.4 at all; releases outside those lines are not listed as affected.","needs_analyst":true,"not_affected_if":["no-untrusted-local-logons","other-os"],"who_is_affected":"Systems running Oracle Solaris 11.3 or 11.4 where untrusted users or processes can log on, including shared hosts, jump boxes and build machines. The attacker needs a local logon, so single-user machines with no other accounts are at much lower risk, but any foothold on a Solaris host becomes a full takeover. Other operating systems are not affected.","user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.000683,"input_tokens":3445,"output_tokens":677,"severity_before":"high"},"analyst_status":null,"analyst_note":null,"search":"'-2026':14A,17A '-91348':15A,18A '/av':143C '11.3':39B,95C '11.4':41B,97C '3.1':130C,142C '8.4':133C 'access':70B 'affect':93C 'allow':101C 'alreadi':46B 'attack':44B,74B,103C,118C 'avail':137C 'base':131C 'beyond':68B 'compon':35B,87C 'compromis':53B,114C 'confidenti':134C 'cve':13A,16A 'cvss':59B,129C,139C,141C 'easili':98C 'execut':112C 'exploit':99C 'flaw':4A,31B 'full':76B 'give':75B 'h':151C 'h/a':150C 'h/i':149C 'host':28B 'impact':138C 'infrastructur':19B,108C 'integr':135C 'interact':63B 'l/ac':144C 'l/pr':145C 'let':5A,42B 'local':7A,69B 'logon':49B,105C 'machin':52B 'n/s':147C 'n/ui':146C 'need':67B 'on-prem':20B 'oper':55B 'oracl':1A,24B,37B,81C,85C,110C,115C,127C 'oracle-solari':23B 'per':57B 'prem':22B 'privileg':65B 'product':83C 'result':123C 'score':132C 'share':27B 'shared-host':26B 'solari':2A,25B,29B,38B,82C,111C,116C,128C 'success':73B,117C 'support':89C 'system':12A,56B,86C 'take':9A 'takeov':77B,125C 'u/c':148C 'unauthent':102C 'user':8A,62B 'util':3A,34B,88C 'vector':60B,140C 'version':90C 'vulner':78C,100C,121C","nicknames":[],"mitigations":[],"who_affected":"Systems running Oracle Solaris 11.3 or 11.4 where untrusted users or processes can log on, including shared hosts, jump boxes and build machines. The attacker needs a local logon, so single-user machines with no other accounts are at much lower risk, but any foothold on a Solaris host becomes a full takeover. Other operating systems are not affected.","tier":"B","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-20T22:20:37+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cvss_by":"secalert_us@oracle.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-91348","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-91348","severity":null,"published_at":"2026-10-20T22:20:37+00:00","modified_at":"2026-10-21T18:44:40+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-2026-91348","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-91348","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"}