{"id":"CVE-2026-77173","kind":"vulnerability","aliases":["CVE-2026-77173"],"related":[],"title":"Document labeling flaw lets docx or odt files with # in name skip confidential marking","description":"A user could create a docx or odt file with a # in the filename with confidential information such as a credit card number and have it not be marked as confidential.","summary":"A user could create a docx or odt file whose filename contains a # character and store confidential data such as a credit card number in it. The file would not be marked as confidential, so protective handling tied to that label would not apply.","severity":"medium","cvss":4.3,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["document-classification","docx","odt","other"],"not_affected_if":[],"how_to_check":null,"fix":null,"status":"open","published_at":"2026-10-27T17:17:03+00:00","first_seen_at":"2026-10-27T17:32:46+00:00","triaged_at":"2026-10-27T17:34:58+00:00","updated_at":"2026-10-27T17:34:58+00:00","category":"other","confidence":0.35,"triage":{"at":"2026-10-27T17:34:58Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"unknown","title":"Document labeling flaw lets docx or odt files with # in name skip confidential marking","impact":"low","summary":"A user could create a docx or odt file whose filename contains a # character and store confidential data such as a credit card number in it. The file would not be marked as confidential, so protective handling tied to that label would not apply.","category":"other","nicknames":[],"who_cares":["document-classification","docx","odt"],"confidence":0.35,"needs_auth":"yes","worst_case":"Confidential documents escape classification and their protective handling.","analyst_note":"Identify the affected product from the NVD entry (https://nvd.nist.gov/vuln/detail/CVE-2026-77173) and its CPE list, then find the vendor advisory for affected versions and fixes.","how_to_check":"unknown","needs_analyst":true,"not_affected_if":[],"who_is_affected":"unknown","user_interaction":"yes","needs_special_setup":"unknown","severity_if_unknown":"medium"},"cost_usd":0.000504,"input_tokens":3252,"output_tokens":357,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-2026':16A,19A '-77173':17A,20A 'appli':69B 'card':48B,91C 'charact':39B 'classif':23B 'confidenti':13A,42B,59B,85C,100C 'contain':37B 'could':28B,72C 'creat':29B,73C 'credit':47B,90C 'cve':15A,18A 'data':43B 'document':1A,22B 'document-classif':21B 'docx':5A,24B,31B,75C 'file':8A,34B,53B,78C 'filenam':36B,83C 'flaw':3A 'handl':62B 'inform':86C 'label':2A,66B 'let':4A 'mark':14A,57B,98C 'name':11A 'number':49B,92C 'odt':7A,25B,33B,77C 'protect':61B 'skip':12A 'store':41B 'tie':63B 'user':27B,71C 'whose':35B 'would':54B,67B","nicknames":[],"mitigations":[],"who_affected":null,"tier":"C","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-27T17:17:03+00:00","kev":null,"cvss_vector":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","cvss_by":"support@hackerone.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-77173","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-77173","severity":null,"published_at":"2026-10-27T17:17:03+00:00","modified_at":"2026-10-27T17:17:03+00:00","first_seen_at":"2026-10-27T17:32:46+00:00","fetched_at":"2026-10-27T17:32:46+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"}