{"id":"CVE-2023-41763","kind":"vulnerability","aliases":["CVE-2023-41763"],"related":[],"title":"microsoft skype for business server: Skype for Business Elevation of Privilege Vulnerability","description":"Microsoft Skype for Business contains an unspecified vulnerability that allows for privilege escalation.\n\nCISA required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.","summary":"Microsoft Skype for Business has an unspecified flaw that lets a user escalate their privileges. CISA lists it as actively exploited in the wild.","severity":"medium","cvss":5.3,"epss":null,"exploited":true,"exploited_at":"2023-10-10T00:00:00+00:00","products":[{"name":"Microsoft Skype for Business","fixed":[],"affected":"","ecosystem":"vendor"},{"name":"microsoft skype for business server","fixed":[],"affected":"= 2015","ecosystem":"vendor"},{"name":"microsoft skype for business server","fixed":[],"affected":"= 2019","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["exploited","other","skype-for-business","windows"],"not_affected_if":["not-using-skype-for-business"],"how_to_check":null,"fix":"Apply mitigations per vendor instructions, or discontinue use of the product if mitigations are unavailable (per CISA required action).","status":"open","published_at":"2023-10-10T00:00:00+00:00","first_seen_at":"2026-10-23T19:11:51+00:00","triaged_at":"2026-10-23T21:04:25+00:00","updated_at":"2026-10-23T22:29:04+00:00","category":"other","confidence":0.5,"triage":{"at":"2026-10-23T21:04:25Z","model":"claude-haiku-5-5","output":{"fix":"Apply mitigations per vendor instructions, or discontinue use of the product if mitigations are unavailable (per CISA required action).","reach":"unknown","impact":"high","summary":"Microsoft Skype for Business has an unspecified flaw that lets a user escalate their privileges. CISA lists it as actively exploited in the wild.","category":"other","who_cares":["skype-for-business","windows"],"confidence":0.5,"needs_auth":"unknown","worst_case":"Attacker gains higher privileges than granted on affected systems.","analyst_note":"Find the Microsoft advisory for CVE-2023-41763 to confirm affected and fixed versions and the specific mitigation steps.","how_to_check":"unknown","needs_analyst":true,"not_affected_if":["not-using-skype-for-business"],"user_interaction":"unknown","needs_special_setup":"unknown","severity_if_unknown":"unknown"},"cost_usd":0.000442,"input_tokens":2802,"output_tokens":323,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-2023':14A,17A '-41763':15A,18A 'action':79C 'activ':59B 'allow':73C 'appli':80C 'busi':4A,8A,38B,43B,67C 'business':22A,26A,31A 'cisa':55B,77C 'contain':68C 'cve':13A,16A 'discontinu':86C 'elev':9A 'escal':52B,76C 'exploit':33B,60B 'flaw':47B 'for':21A,25A,30A 'instruct':84C 'let':49B 'list':56B 'microsoft':1A,19A,23A,28A,40B,64C 'mitig':81C,92C 'per':82C 'privileg':11A,54B,75C 'product':90C 'requir':78C 'server':5A,27A,32A 'skype':2A,6A,20A,24A,29A,36B,41B,65C 'skype-for-busi':35B 'unavail':94C 'unspecifi':46B,70C 'use':87C 'user':51B 'vendor':83C 'vulner':12A,71C 'wild':63B 'window':39B","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2023-10-10T00:00:00+00:00","kev":{"dateAdded":"2023-10-10","dueDate":"2023-10-31","requiredAction":"Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.","knownRansomwareCampaignUse":"Unknown"},"cvss_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","cvss_by":"secure@microsoft.com","poc_count":0,"sources":[{"source":"kev","external_id":"CVE-2023-41763","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2023-41763","severity":null,"published_at":"2023-10-10T00:00:00+00:00","modified_at":null,"first_seen_at":"2026-10-23T19:11:51+00:00","fetched_at":"2026-10-25T14:39:39+00:00","note":null},{"source":"nvd","external_id":"CVE-2023-41763","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-41763","severity":null,"published_at":"2023-10-10T18:15:18+00:00","modified_at":"2026-06-17T06:22:45+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"}