{"id":"CVE-2026-109495","kind":"vulnerability","aliases":["CVE-2026-109495"],"related":[],"title":"Microsoft SharePoint: missing authorization lets a logged-in user gain privileges","description":"Missing authorization in Microsoft Office SharePoint allows an authorized attacker to elevate privileges over a network.","summary":"Microsoft Office SharePoint lacks an authorization check, so an attacker who already has a valid account can raise their privileges over the network. The NVD entry rates it medium (CVSS 6.6) and reports no exploitation in the wild.","severity":"medium","cvss":6.6,"epss":null,"exploited":false,"exploited_at":null,"products":[{"name":"Microsoft Office SharePoint","fixed":[],"affected":"","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["microsoft-office","on-premises","sharepoint","vendor"],"not_affected_if":["sharepoint-online"],"how_to_check":null,"fix":null,"status":"open","published_at":"2026-11-10T19:18:18+00:00","first_seen_at":"2026-11-10T19:24:25+00:00","triaged_at":"2026-11-10T19:56:04+00:00","updated_at":"2026-11-10T19:56:04+00:00","category":"vendor","confidence":0.5,"triage":{"at":"2026-11-10T19:56:04Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"network","title":"Microsoft SharePoint: missing authorization lets a logged-in user gain privileges","impact":"medium","summary":"Microsoft Office SharePoint lacks an authorization check, so an attacker who already has a valid account can raise their privileges over the network. The NVD entry rates it medium (CVSS 6.6) and reports no exploitation in the wild.","audience":"businesses","category":"vendor","nicknames":[],"who_cares":["sharepoint","microsoft-office","on-premises"],"confidence":0.5,"fix_status":"unknown","needs_auth":"yes","worst_case":"low-privileged user gains higher privileges on the SharePoint server","analyst_note":"Find Microsoft's MSRC advisory for CVE-2026-109495 to confirm affected versions, patch and any mitigation.","how_to_check":"- unknown","plain_action":"","product_name":"Microsoft Office SharePoint","needs_analyst":true,"not_affected_if":["sharepoint-online"],"who_is_affected":"Organizations running Microsoft SharePoint on-premises with user accounts that can reach the affected functionality. The sources do not say which SharePoint versions or configurations are affected, so unknown.","user_interaction":"no","product_ecosystem":"vendor","needs_special_setup":"unknown","severity_if_unknown":"medium"},"cost_usd":0.000691,"input_tokens":4493,"output_tokens":483,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-109495':15A,18A '-2026':14A,17A '6.6':60B 'account':45B 'allow':74C 'alreadi':41B 'attack':39B,77C 'author':4A,35B,69C,76C 'check':36B 'cve':13A,16A 'cvss':59B 'elev':79C 'entri':55B 'exploit':64B 'gain':11A 'lack':33B 'let':5A 'log':8A 'logged-in':7A 'medium':58B 'microsoft':1A,19A,23B,30B,71C 'microsoft-offic':22B 'miss':3A,68C 'network':52B,83C 'nvd':54B 'offic':24B,31B,72C 'office':20A 'on-premis':25B 'premis':27B 'privileg':12A,49B,80C 'rais':47B 'rate':56B 'report':62B 'sharepoint':2A,21A,28B,32B,73C 'user':10A 'valid':44B 'vendor':29B 'wild':67B","nicknames":[],"mitigations":[],"who_affected":"Organizations running Microsoft SharePoint on-premises with user accounts that can reach the affected functionality. The sources do not say which SharePoint versions or configurations are affected, so unknown.","tier":"C","verified":{},"analyst_revisit_at":null,"fix_status":"none","audience":"businesses","plain_action":null,"pkeys":["microsoftofficesharepoint","officesharepoint"],"ptokens":["microsoft","office","sharepoint"],"labels":["medium","microsoftoffice","onpremises","sharepoint","vendor"],"campaign_type":null,"search_a":"'-109495':15A,18A '-2026':14A,17A 'author':4A 'cve':13A,16A 'gain':11A 'let':5A 'log':8A 'logged-in':7A 'microsoft':1A,19A 'miss':3A 'office':20A 'privileg':12A 'sharepoint':2A,21A 'user':10A","search_b":"'6.6':60B 'account':45B 'alreadi':41B 'attack':39B 'author':35B 'check':36B 'cvss':59B 'entri':55B 'exploit':64B 'lack':33B 'medium':58B 'microsoft':23B,30B 'microsoft-offic':22B 'network':52B 'nvd':54B 'offic':24B,31B 'on-premis':25B 'premis':27B 'privileg':49B 'rais':47B 'rate':56B 'report':62B 'sharepoint':28B,32B 'valid':44B 'vendor':29B 'wild':67B","search_c":"'allow':74C 'attack':77C 'author':69C,76C 'elev':79C 'microsoft':71C 'miss':68C 'network':83C 'offic':72C 'privileg':80C 'sharepoint':73C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-10T19:18:18+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H","cvss_by":"secure@microsoft.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-109495","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-109495","severity":null,"published_at":"2026-11-10T19:18:18+00:00","modified_at":"2026-11-10T19:18:18+00:00","first_seen_at":"2026-11-10T19:24:25+00:00","fetched_at":"2026-11-10T19:24:25+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"}