{"id":"CVE-2026-109472","kind":"vulnerability","aliases":["CVE-2026-109472"],"related":[],"title":"Microsoft SharePoint: untrusted data deserialization lets an authorized user run code","description":"Deserialization of untrusted data in Microsoft Office SharePoint allows an authorized attacker to execute code over a network.","summary":"Microsoft Office SharePoint deserializes untrusted data in a way that lets an authorized attacker execute code over a network. The sources give no further detail on the affected versions or the exact trigger.","severity":"high","cvss":8.8,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["microsoft-office","self-hosted","sharepoint","vendor","windows"],"not_affected_if":["sharepoint-online"],"how_to_check":null,"fix":null,"status":"open","published_at":"2026-11-10T19:18:16+00:00","first_seen_at":"2026-11-10T19:24:24+00:00","triaged_at":"2026-11-10T19:33:59+00:00","updated_at":"2026-11-10T19:33:59+00:00","category":"vendor","confidence":0.6,"triage":{"at":"2026-11-10T19:33:59Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"network","title":"Microsoft SharePoint: untrusted data deserialization lets an authorized user run code","impact":"high","summary":"Microsoft Office SharePoint deserializes untrusted data in a way that lets an authorized attacker execute code over a network. The sources give no further detail on the affected versions or the exact trigger.","audience":"businesses","category":"vendor","nicknames":[],"who_cares":["sharepoint","microsoft-office","self-hosted","windows"],"confidence":0.6,"fix_status":"unknown","needs_auth":"yes","worst_case":"code runs on the SharePoint server over the network","analyst_note":"Find the Microsoft Security Response Center advisory for CVE-2026-109472 to confirm affected builds, fixed versions and mitigations.","how_to_check":"- unknown","plain_action":"","product_name":"","needs_analyst":true,"not_affected_if":["sharepoint-online"],"who_is_affected":"Organizations running Microsoft SharePoint on-premises where users hold valid accounts. The sources do not state which SharePoint versions or configurations are affected, so a team should confirm against the Microsoft advisory.","user_interaction":"unknown","product_ecosystem":"","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.000672,"input_tokens":4495,"output_tokens":445,"severity_before":"high"},"analyst_status":"queued","analyst_note":"Find the Microsoft Security Response Center advisory for CVE-2026-109472 to confirm affected builds, fixed versions and mitigations.","search":"'-109472':14A,17A '-2026':13A,16A 'affect':54B 'allow':68C 'attack':40B,71C 'author':8A,39B,70C 'code':11A,42B,74C 'cve':12A,15A 'data':4A,32B,63C 'deseri':5A,30B,60C 'detail':51B 'exact':58B 'execut':41B,73C 'give':48B 'host':23B 'let':6A,37B 'microsoft':1A,19B,27B,65C 'microsoft-offic':18B 'network':45B,77C 'offic':20B,28B,66C 'run':10A 'self':22B 'self-host':21B 'sharepoint':2A,24B,29B,67C 'sourc':47B 'trigger':59B 'untrust':3A,31B,62C 'user':9A 'vendor':25B 'version':55B 'way':35B 'window':26B","nicknames":[],"mitigations":[],"who_affected":"Organizations running Microsoft SharePoint on-premises where users hold valid accounts. The sources do not state which SharePoint versions or configurations are affected, so a team should confirm against the Microsoft advisory.","tier":"B","verified":{},"analyst_revisit_at":null,"fix_status":"none","audience":"businesses","plain_action":null,"pkeys":[],"ptokens":[],"labels":["high","microsoftoffice","selfhosted","sharepoint","vendor","windows"],"campaign_type":null,"search_a":"'-109472':14A,17A '-2026':13A,16A 'author':8A 'code':11A 'cve':12A,15A 'data':4A 'deseri':5A 'let':6A 'microsoft':1A 'run':10A 'sharepoint':2A 'untrust':3A 'user':9A","search_b":"'affect':54B 'attack':40B 'author':39B 'code':42B 'data':32B 'deseri':30B 'detail':51B 'exact':58B 'execut':41B 'give':48B 'host':23B 'let':37B 'microsoft':19B,27B 'microsoft-offic':18B 'network':45B 'offic':20B,28B 'self':22B 'self-host':21B 'sharepoint':24B,29B 'sourc':47B 'trigger':59B 'untrust':31B 'vendor':25B 'version':55B 'way':35B 'window':26B","search_c":"'allow':68C 'attack':71C 'author':70C 'code':74C 'data':63C 'deseri':60C 'execut':73C 'microsoft':65C 'network':77C 'offic':66C 'sharepoint':67C 'untrust':62C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-10T19:18:16+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cvss_by":"secure@microsoft.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-109472","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-109472","severity":null,"published_at":"2026-11-10T19:18:16+00:00","modified_at":"2026-11-10T19:18:16+00:00","first_seen_at":"2026-11-10T19:24:24+00:00","fetched_at":"2026-11-10T19:24:24+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"}