{"id":"CVE-2021-27102","kind":"vulnerability","aliases":["CVE-2021-27102"],"related":[],"title":"Accellion FTA: Accellion FTA OS Command Injection Vulnerability","description":"Accellion FTA contains an OS command injection vulnerability exploited via a local web service call.\n\nCISA required action: Apply updates per vendor instructions.","summary":"Accellion FTA (File Transfer Appliance) has an OS command injection flaw reachable through a local web service call. Attackers can run operating system commands on the appliance, and the sources say it is exploited in the wild and tied to ransomware.","severity":"high","cvss":7.8,"epss":0.03654,"exploited":true,"exploited_at":"2021-11-03T00:00:00+00:00","products":[{"name":"Accellion FTA","fixed":[],"affected":"","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["accellion-fta","exploited","file-transfer-appliance","ransomware","self-hosted","vendor"],"not_affected_if":["unknown"],"how_to_check":null,"fix":"Apply updates per vendor instructions (CISA required action); the specific fixed version is unknown from the sources.","status":"open","published_at":"2021-02-16T21:15:13+00:00","first_seen_at":"2026-10-23T19:11:53+00:00","triaged_at":"2026-10-23T21:37:07+00:00","updated_at":"2026-10-23T21:57:35+00:00","category":"vendor","confidence":0.6,"triage":{"at":"2026-10-23T21:37:07Z","model":"claude-haiku-5-5","output":{"fix":"Apply updates per vendor instructions (CISA required action); the specific fixed version is unknown from the sources.","reach":"unknown","impact":"high","summary":"Accellion FTA (File Transfer Appliance) has an OS command injection flaw reachable through a local web service call. Attackers can run operating system commands on the appliance, and the sources say it is exploited in the wild and tied to ransomware.","category":"vendor","who_cares":["accellion-fta","file-transfer-appliance","self-hosted"],"confidence":0.6,"needs_auth":"unknown","worst_case":"Attacker runs operating system commands on the appliance","analyst_note":"Find the vendor advisory and affected/fixed version list for CVE-2021-27102 and any indicators of compromise; the sources do not give versions or detection steps.","how_to_check":"unknown","needs_analyst":true,"not_affected_if":["unknown"],"user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.000457,"input_tokens":2809,"output_tokens":352,"severity_before":"unknown"},"analyst_status":"queued","analyst_note":"Find the vendor advisory and affected/fixed version list for CVE-2021-27102 and any indicators of compromise; the sources do not give versions or detection steps.","search":"'-2021':10A,13A '-27102':11A,14A 'accellion':1A,3A,15A,18B,30B,71C 'accellion-fta':17B 'action':88C 'appli':89C 'applianc':24B,34B,56B 'attack':48B 'call':47B,85C 'cisa':86C 'command':6A,38B,53B,76C 'contain':73C 'cve':9A,12A 'exploit':20B,63B,79C 'file':22B,32B 'file-transfer-appli':21B 'flaw':40B 'fta':2A,4A,16A,19B,31B,72C 'host':28B 'inject':7A,39B,77C 'instruct':93C 'local':44B,82C 'oper':51B 'os':5A,37B,75C 'per':91C 'ransomwar':25B,70B 'reachabl':41B 'requir':87C 'run':50B 'say':60B 'self':27B 'self-host':26B 'servic':46B,84C 'sourc':59B 'system':52B 'tie':68B 'transfer':23B,33B 'updat':90C 'vendor':29B,92C 'via':80C 'vulner':8A,78C 'web':45B,83C 'wild':66B","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2021-02-16T21:15:13+00:00","kev":{"dateAdded":"2021-11-03","dueDate":"2021-11-17","requiredAction":"Apply updates per vendor instructions.","knownRansomwareCampaignUse":"Known"},"cvss_vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cvss_by":"nvd@nist.gov","poc_count":0,"sources":[{"source":"kev","external_id":"CVE-2021-27102","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2021-27102","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":"2026-10-25T20:35:38+00:00","note":null},{"source":"epss","external_id":"CVE-2021-27102","url":"https://api.first.org/data/v1/epss?cve=CVE-2021-27102","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-2021-27102","url":"https://nvd.nist.gov/vuln/detail/CVE-2021-27102","severity":null,"published_at":"2021-02-16T21:15:13+00:00","modified_at":"2026-06-17T03:44:17+00:00","first_seen_at":"2026-10-23T21:57:35+00:00","fetched_at":"2026-10-23T21:57:35+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"}