{"id":"CVE-2026-121675","kind":"vulnerability","aliases":["CVE-2026-121675"],"related":[],"title":"Microsoft PowerShell: XML external entity flaw lets attackers read information over network","description":"Improper restriction of xml external entity reference in Microsoft PowerShell allows an unauthorized attacker to disclose information over a network.","summary":"Microsoft PowerShell does not properly restrict XML external entity references, so an unauthorized attacker can disclose information over a network. The sources give no further detail on which data is exposed or which PowerShell versions are affected.","severity":"medium","cvss":6.1,"epss":null,"exploited":false,"exploited_at":null,"products":[{"name":"PowerShell","fixed":[],"affected":"","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["powershell","runtime","windows"],"not_affected_if":[],"how_to_check":null,"fix":null,"status":"open","published_at":"2026-11-10T19:20:31+00:00","first_seen_at":"2026-11-10T19:25:09+00:00","triaged_at":"2026-11-10T19:58:29+00:00","updated_at":"2026-11-10T19:58:29+00:00","category":"runtime","confidence":0.4,"triage":{"at":"2026-11-10T19:58:29Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"network","title":"Microsoft PowerShell: XML external entity flaw lets attackers read information over network","impact":"low","summary":"Microsoft PowerShell does not properly restrict XML external entity references, so an unauthorized attacker can disclose information over a network. The sources give no further detail on which data is exposed or which PowerShell versions are affected.","audience":"businesses","category":"runtime","nicknames":[],"who_cares":["powershell","windows"],"confidence":0.4,"fix_status":"unknown","needs_auth":"unknown","worst_case":"Unauthorized attacker reads information over the network","analyst_note":"Check the Microsoft Security Response Center advisory for CVE-2026-121675 for affected PowerShell versions, required configuration, and the patched build.","how_to_check":"unknown","plain_action":"","product_name":"PowerShell","needs_analyst":true,"not_affected_if":[],"who_is_affected":"unknown","user_interaction":"unknown","product_ecosystem":"vendor","needs_special_setup":"unknown","severity_if_unknown":"medium"},"cost_usd":0.000645,"input_tokens":4499,"output_tokens":391,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-121675':15A,18A '-2026':14A,17A 'affect':59B 'allow':70C 'attack':8A,36B,73C 'cve':13A,16A 'data':51B 'detail':48B 'disclos':38B,75C 'entiti':5A,31B,65C 'expos':53B 'extern':4A,30B,64C 'flaw':6A 'give':45B 'improp':60C 'inform':10A,39B,76C 'let':7A 'microsoft':1A,23B,68C 'network':12A,42B,79C 'powershel':2A,20B,24B,56B,69C 'powershell':19A 'proper':27B 'read':9A 'refer':32B,66C 'restrict':28B,61C 'runtim':21B 'sourc':44B 'unauthor':35B,72C 'version':57B 'window':22B 'xml':3A,29B,63C","nicknames":[],"mitigations":[],"who_affected":null,"tier":"C","verified":{},"analyst_revisit_at":null,"fix_status":"none","audience":"businesses","plain_action":null,"pkeys":["powershell"],"ptokens":["powershell"],"labels":["medium","powershell","runtime","vendor","windows"],"campaign_type":null,"search_a":"'-121675':15A,18A '-2026':14A,17A 'attack':8A 'cve':13A,16A 'entiti':5A 'extern':4A 'flaw':6A 'inform':10A 'let':7A 'microsoft':1A 'network':12A 'powershel':2A 'powershell':19A 'read':9A 'xml':3A","search_b":"'affect':59B 'attack':36B 'data':51B 'detail':48B 'disclos':38B 'entiti':31B 'expos':53B 'extern':30B 'give':45B 'inform':39B 'microsoft':23B 'network':42B 'powershel':20B,24B,56B 'proper':27B 'refer':32B 'restrict':28B 'runtim':21B 'sourc':44B 'unauthor':35B 'version':57B 'window':22B 'xml':29B","search_c":"'allow':70C 'attack':73C 'disclos':75C 'entiti':65C 'extern':64C 'improp':60C 'inform':76C 'microsoft':68C 'network':79C 'powershel':69C 'refer':66C 'restrict':61C 'unauthor':72C 'xml':63C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-10T19:20:31+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:N/A:N","cvss_by":"secure@microsoft.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-121675","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-121675","severity":null,"published_at":"2026-11-10T19:20:31+00:00","modified_at":"2026-11-10T19:20:31+00:00","first_seen_at":"2026-11-10T19:25:09+00:00","fetched_at":"2026-11-10T19:25:09+00:00","note":null}],"documents":[],"disclosures":[],"exploit_sources":[],"notice":"Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai"}