{"id":"CVE-2023-21715","kind":"vulnerability","aliases":["CVE-2023-21715"],"related":[],"title":"microsoft 365 apps: Microsoft Publisher Security Feature Bypass Vulnerability","description":"Microsoft Office Publisher contains a security feature bypass vulnerability that allows for a local, authenticated attack on a targeted system.\n\nCISA required action: Apply updates per vendor instructions.","summary":"Microsoft Office Publisher has a security feature bypass flaw that lets a local, authenticated user get around protections on the machine. CISA lists it as actively exploited in the wild.","severity":"high","cvss":7.3,"epss":null,"exploited":true,"exploited_at":"2023-02-14T00:00:00+00:00","products":[{"name":"Microsoft Office","fixed":[],"affected":"","ecosystem":"vendor"},{"name":"microsoft 365 apps","fixed":[],"affected":"","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["exploited","microsoft-office","package","windows"],"not_affected_if":[],"how_to_check":null,"fix":"Apply the Microsoft Office security updates per vendor instructions; specific fixed build numbers are not in the sources.","status":"open","published_at":"2023-02-14T00:00:00+00:00","first_seen_at":"2026-10-23T19:11:52+00:00","triaged_at":"2026-10-23T21:08:40+00:00","updated_at":"2026-10-23T22:29:04+00:00","category":"package","confidence":0.6,"triage":{"at":"2026-10-23T21:08:40Z","model":"claude-haiku-5-5","output":{"fix":"Apply the Microsoft Office security updates per vendor instructions; specific fixed build numbers are not in the sources.","reach":"local","impact":"medium","summary":"Microsoft Office Publisher has a security feature bypass flaw that lets a local, authenticated user get around protections on the machine. CISA lists it as actively exploited in the wild.","category":"package","who_cares":["microsoft-office","windows"],"confidence":0.6,"needs_auth":"yes","worst_case":"local attacker bypasses a security feature on the machine","analyst_note":"Find the Microsoft advisory for CVE-2023-21715 for affected and fixed Office build numbers and any check steps.","how_to_check":"unknown","needs_analyst":true,"not_affected_if":[],"user_interaction":"unknown","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.000431,"input_tokens":2785,"output_tokens":305,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-2023':11A,14A '-21715':12A,15A '365':2A,19A 'action':79C 'activ':52B 'allow':67C 'app':3A 'appli':80C 'apps':20A 'around':43B 'attack':72C 'authent':40B,71C 'bypass':8A,34B,64C 'cisa':48B,77C 'contain':60C 'cve':10A,13A 'exploit':21B,53B 'featur':7A,33B,63C 'flaw':35B 'get':42B 'instruct':84C 'let':37B 'list':49B 'local':39B,70C 'machin':47B 'microsoft':1A,4A,16A,18A,23B,27B,57C 'microsoft-offic':22B 'offic':24B,28B,58C 'office':17A 'packag':25B 'per':82C 'protect':44B 'publish':5A,29B,59C 'requir':78C 'secur':6A,32B,62C 'system':76C 'target':75C 'updat':81C 'user':41B 'vendor':83C 'vulner':9A,65C 'wild':56B 'window':26B","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2023-02-14T00:00:00+00:00","kev":{"dateAdded":"2023-02-14","dueDate":"2023-03-07","requiredAction":"Apply updates per vendor instructions.","knownRansomwareCampaignUse":"Unknown"},"cvss_vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H","cvss_by":"secure@microsoft.com","poc_count":0,"sources":[{"source":"kev","external_id":"CVE-2023-21715","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2023-21715","severity":null,"published_at":"2023-02-14T00:00:00+00:00","modified_at":null,"first_seen_at":"2026-10-23T19:11:52+00:00","fetched_at":"2026-10-25T11:39:16+00:00","note":null},{"source":"nvd","external_id":"CVE-2023-21715","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-21715","severity":null,"published_at":"2023-02-14T20:15:14+00:00","modified_at":"2026-08-19T17:18:12+00:00","first_seen_at":"2026-10-23T22:29:04+00:00","fetched_at":"2026-10-23T22:29:04+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"}