{"id":"CVE-2016-3976","kind":"vulnerability","aliases":["CVE-2016-3976"],"related":[],"title":"SAP NetWeaver: SAP NetWeaver Directory Traversal Vulnerability","description":"SAP NetWeaver Application Server Java Platforms contains a directory traversal vulnerability via a ..\\ (dot dot backslash) in the fileName parameter to CrashFileDownloadServlet. This allows remote attackers to read files.\n\nCISA required action: Apply updates per vendor instructions.","summary":"SAP NetWeaver Application Server Java has a directory traversal flaw in CrashFileDownloadServlet, where a ..\\ sequence in the fileName parameter escapes the intended folder. A remote attacker can read arbitrary files from the server.","severity":"high","cvss":7.5,"epss":0.47252,"exploited":true,"exploited_at":"2021-11-03T00:00:00+00:00","products":[{"name":"SAP NetWeaver","fixed":[],"affected":"","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["exploited","java","netweaver","runtime","sap"],"not_affected_if":["not-java-application-server"],"how_to_check":null,"fix":"Apply the SAP update per vendor instructions, as CISA's required action states; the specific SAP Security Note and fixed version are not in the sources.","status":"open","published_at":"2016-04-07T23:59:10+00:00","first_seen_at":"2026-10-23T19:11:53+00:00","triaged_at":"2026-10-23T21:41:28+00:00","updated_at":"2026-10-23T21:57:34+00:00","category":"runtime","confidence":0.6,"triage":{"at":"2026-10-23T21:41:28Z","model":"claude-haiku-5-5","output":{"fix":"Apply the SAP update per vendor instructions, as CISA's required action states; the specific SAP Security Note and fixed version are not in the sources.","reach":"internet","impact":"medium","summary":"SAP NetWeaver Application Server Java has a directory traversal flaw in CrashFileDownloadServlet, where a ..\\ sequence in the fileName parameter escapes the intended folder. A remote attacker can read arbitrary files from the server.","category":"runtime","who_cares":["sap","netweaver","java"],"confidence":0.6,"needs_auth":"unknown","worst_case":"Remote attackers read arbitrary files, including configuration and credential files.","analyst_note":"Find the SAP Security Note for CVE-2016-3976 and the fixed NetWeaver Java patch level, plus whether CrashFileDownloadServlet can be disabled; sources do not give these.","how_to_check":"unknown","needs_analyst":true,"not_affected_if":["not-java-application-server"],"user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.000477,"input_tokens":2861,"output_tokens":382,"severity_before":"unknown"},"analyst_status":"queued","analyst_note":"Find the SAP Security Note for CVE-2016-3976 and the fixed NetWeaver Java patch level, plus whether CrashFileDownloadServlet can be disabled; sources do not give these.","search":"'-2016':9A,12A '-3976':10A,13A 'action':85C 'allow':77C 'appli':86C 'applic':23B,56C 'arbitrari':49B 'attack':46B,79C 'backslash':69C 'cisa':83C 'contain':60C 'crashfiledownloadservlet':32B,75C 'cve':8A,11A 'directori':5A,28B,62C 'dot':67C,68C 'escap':40B 'exploit':16B 'file':50B,82C 'filenam':38B,72C 'flaw':30B 'folder':43B 'instruct':90C 'intend':42B 'java':17B,25B,58C 'netweav':2A,4A,18B,22B,55C 'netweaver':15A 'paramet':39B,73C 'per':88C 'platform':59C 'read':48B,81C 'remot':45B,78C 'requir':84C 'runtim':19B 'sap':1A,3A,14A,20B,21B,54C 'sequenc':35B 'server':24B,53B,57C 'travers':6A,29B,63C 'updat':87C 'vendor':89C 'via':65C 'vulner':7A,64C","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2016-04-07T23:59:10+00:00","kev":{"dateAdded":"2021-11-03","dueDate":"2022-05-03","requiredAction":"Apply updates per vendor instructions.","knownRansomwareCampaignUse":"Unknown"},"cvss_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","cvss_by":"nvd@nist.gov","poc_count":0,"sources":[{"source":"kev","external_id":"CVE-2016-3976","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2016-3976","severity":null,"published_at":"2021-11-03T00:00:00+00:00","modified_at":null,"first_seen_at":"2026-10-23T19:11:53+00:00","fetched_at":"2026-10-25T13:39:33+00:00","note":null},{"source":"epss","external_id":"CVE-2016-3976","url":"https://api.first.org/data/v1/epss?cve=CVE-2016-3976","severity":null,"published_at":null,"modified_at":null,"first_seen_at":"2026-10-23T19:13:44+00:00","fetched_at":"2026-10-23T19:13:44+00:00","note":null},{"source":"nvd","external_id":"CVE-2016-3976","url":"https://nvd.nist.gov/vuln/detail/CVE-2016-3976","severity":null,"published_at":"2016-04-07T23:59:10+00:00","modified_at":"2026-06-17T00:46:39+00:00","first_seen_at":"2026-10-23T21:57:34+00:00","fetched_at":"2026-10-23T21:57:34+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"}