{"id":"CVE-2026-91336","kind":"vulnerability","aliases":["CVE-2026-91336"],"related":[],"title":"Oracle Solaris 11.4: Utility flaw lets local users change protected data","description":"Vulnerability in the Oracle Solaris product of Oracle Systems (component: Utility).   The supported version that is affected is 11.4. Easily exploitable vulnerability allows low privileged attacker with logon to the infrastructure where Oracle Solaris executes to compromise Oracle Solaris.  While the vulnerability is in Oracle Solaris, attacks may significantly impact additional products (scope change).  Successful attacks of this vulnerability can result in  unauthorized creation, deletion or modification access to critical data or all Oracle Solaris accessible data. CVSS 3.1 Base Score 6.5 (Integrity impacts).  CVSS Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N).","summary":"A flaw in a Utility component of Oracle Solaris 11.4 lets a low-privileged local user with logon access alter data they should not be able to change. The CVSS vector shows high integrity impact with scope change, so affected data beyond Solaris can be modified.","severity":"medium","cvss":6.5,"epss":0.00137,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["infrastructure","on-prem","oracle","solaris"],"not_affected_if":["no-local-logons","not-solaris-11.4"],"how_to_check":"- Run `pkg info entire` on the Solaris host and compare the version against the fixed release in Oracle's advisory\n- unknown for other checks: the sources do not say which Utility command or setting is involved","fix":"- Apply the Oracle Solaris 11.4 Critical Patch Update that contains the fix, per the Oracle advisory (version unknown in the sources)","status":"open","published_at":"2026-10-20T22:20:35+00:00","first_seen_at":"2026-10-23T21:57:26+00:00","triaged_at":"2026-10-25T03:50:57+00:00","updated_at":"2026-10-25T12:38:52+00:00","category":"infrastructure","confidence":0.6,"triage":{"at":"2026-10-25T03:50:57Z","model":"claude-haiku-5-5","output":{"fix":"- Apply the Oracle Solaris 11.4 Critical Patch Update that contains the fix, per the Oracle advisory (version unknown in the sources)","reach":"local","title":"Oracle Solaris 11.4: Utility flaw lets local users change protected data","impact":"medium","summary":"A flaw in a Utility component of Oracle Solaris 11.4 lets a low-privileged local user with logon access alter data they should not be able to change. The CVSS vector shows high integrity impact with scope change, so affected data beyond Solaris can be modified.","category":"infrastructure","nicknames":[],"who_cares":["solaris","oracle","on-prem"],"confidence":0.6,"needs_auth":"yes","worst_case":"local user modifies critical data on Solaris host","analyst_note":"Confirm the fixed Solaris 11.4 patch level and the affected Utility command from Oracle's Critical Patch Update advisory; the NVD entry gives only the CVSS vector.","how_to_check":"- Run `pkg info entire` on the Solaris host and compare the version against the fixed release in Oracle's advisory\n- unknown for other checks: the sources do not say which Utility command or setting is involved","needs_analyst":true,"not_affected_if":["not-solaris-11.4","no-local-logons"],"who_is_affected":"Hosts running Oracle Solaris 11.4 where local users can log on. The sources do not name the specific Utility component or configuration, so exposure beyond that is unknown. Systems that do not run Solaris 11.4 are not affected.","user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"medium"},"cost_usd":0.000636,"input_tokens":3484,"output_tokens":576,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-2026':13A,16A '-91336':14A,17A '/av':159C '11.4':3A,33B,89C '3.1':149C,158C '6.5':152C 'abl':50B 'access':43B,138C,146C 'addit':121C 'affect':64B,87C 'allow':93C 'alter':44B 'attack':96C,117C,126C 'base':150C 'beyond':66B 'c/c':164C 'chang':9A,52B,62B,124C 'compon':29B,80C 'compromis':107C 'creation':134C 'critic':140C 'cve':12A,15A 'cvss':54B,148C,155C,157C 'data':11A,45B,65B,141C,147C 'delet':135C 'easili':90C 'execut':105C 'exploit':91C 'flaw':5A,25B 'h/a':166C 'high':57B 'impact':59B,120C,154C 'infrastructur':18B,101C 'integr':58B,153C 'l/ac':160C 'l/pr':161C 'l/ui':162C 'let':6A,34B 'local':7A,39B 'logon':42B,98C 'low':37B,94C 'low-privileg':36B 'may':118C 'modif':137C 'modifi':70B 'n':167C 'n/i':165C 'n/s':163C 'on-prem':19B 'oracl':1A,22B,31B,74C,78C,103C,108C,115C,144C 'prem':21B 'privileg':38B,95C 'product':76C,122C 'protect':10A 'result':131C 'scope':61B,123C 'score':151C 'show':56B 'signific':119C 'solari':2A,23B,32B,67B,75C,104C,109C,116C,145C 'success':125C 'support':83C 'system':79C 'unauthor':133C 'user':8A,40B 'util':4A,28B,81C 'vector':55B,156C 'version':84C 'vulner':71C,92C,112C,129C","nicknames":[],"mitigations":[],"who_affected":"Hosts running Oracle Solaris 11.4 where local users can log on. The sources do not name the specific Utility component or configuration, so exposure beyond that is unknown. Systems that do not run Solaris 11.4 are not affected.","tier":"C","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-20T22:20:35+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N","cvss_by":"secalert_us@oracle.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-91336","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-91336","severity":null,"published_at":"2026-10-20T22:20:35+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-2026-91336","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-91336","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"}