{"id":"CVE-2026-111853","kind":"vulnerability","aliases":["CVE-2026-111853"],"related":[],"title":"Tektronix MDO oscilloscopes: SCPI mount command lets remote attackers run OS commands","description":"An issue was discovered on Tektronix 3 Series MDO devices before 1.21.1. An OS command injection vulnerability exists in the FILESystem:MOUNT:DRIve SCPI command handler. Insufficient neutralization of user-supplied input allows remote attackers to execute arbitrary operating system commands with elevated privileges.","summary":"Tektronix 3 Series MDO oscilloscopes before firmware 1.21.1 have an OS command injection flaw in the FILESystem:MOUNT:DRIve SCPI command. A remote attacker can run arbitrary operating system commands on the device with elevated privileges.","severity":"high","cvss":8.8,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["infrastructure","lab-equipment","oscilloscope","tektronix","test-and-measurement"],"not_affected_if":["firmware-1.21.1-or-later","no-network-exposure"],"how_to_check":"Check the firmware version on the scope (unknown for the exact menu path in the sources); any unit reporting a version below 1.21.1 is exposed.","fix":"Update the firmware to 1.21.1 or later.\nRestrict network access to the scope's SCPI port until patched.","status":"open","published_at":"2026-10-17T02:17:18+00:00","first_seen_at":"2026-10-23T21:57:14+00:00","triaged_at":"2026-10-23T22:33:17+00:00","updated_at":"2026-10-23T22:33:17+00:00","category":"infrastructure","confidence":0.7,"triage":{"at":"2026-10-23T22:33:17Z","model":"claude-haiku-5-5","output":{"fix":"Update the firmware to 1.21.1 or later.\nRestrict network access to the scope's SCPI port until patched.","reach":"network","title":"Tektronix MDO oscilloscopes: SCPI mount command lets remote attackers run OS commands","impact":"high","summary":"Tektronix 3 Series MDO oscilloscopes before firmware 1.21.1 have an OS command injection flaw in the FILESystem:MOUNT:DRIve SCPI command. A remote attacker can run arbitrary operating system commands on the device with elevated privileges.","category":"infrastructure","who_cares":["tektronix","oscilloscope","test-and-measurement","lab-equipment"],"confidence":0.7,"needs_auth":"unknown","worst_case":"Remote attacker runs arbitrary OS commands with elevated privileges on the device","analyst_note":"Confirm the SCPI access path and whether authentication is required, using the vendor advisory or the NVD entry at https://nvd.nist.gov/vuln/detail/CVE-2026-111853.","how_to_check":"Check the firmware version on the scope (unknown for the exact menu path in the sources); any unit reporting a version below 1.21.1 is exposed.","needs_analyst":true,"not_affected_if":["firmware-1.21.1-or-later","no-network-exposure"],"user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.000542,"input_tokens":2917,"output_tokens":501,"severity_before":"high"},"analyst_status":null,"analyst_note":null,"search":"'-111853':15A,18A '-2026':14A,17A '1.21.1':36B,76C '3':30B,71C 'allow':98C 'arbitrari':55B,103C 'attack':9A,52B,100C 'command':6A,12A,40B,49B,58B,79C,89C,106C 'cve':13A,16A 'devic':61B,74C 'discov':68C 'drive':47B,87C 'elev':63B,108C 'equip':22B 'execut':102C 'exist':82C 'filesystem':45B,85C 'firmwar':35B 'flaw':42B 'handler':90C 'infrastructur':19B 'inject':41B,80C 'input':97C 'insuffici':91C 'issu':66C 'lab':21B 'lab-equip':20B 'let':7A 'mdo':2A,32B,73C 'measur':28B 'mount':5A,46B,86C 'neutral':92C 'oper':56B,104C 'os':11A,39B,78C 'oscilloscop':3A,23B,33B 'privileg':64B,109C 'remot':8A,51B,99C 'run':10A,54B 'scpi':4A,48B,88C 'seri':31B,72C 'suppli':96C 'system':57B,105C 'tektronix':1A,24B,29B,70C 'test':26B 'test-and-measur':25B 'user':95C 'user-suppli':94C 'vulner':81C","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-17T02:17:18+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cvss_by":"cve@mitre.org","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-111853","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-111853","severity":null,"published_at":"2026-10-17T02:17:18+00:00","modified_at":"2026-10-19T21:14:14+00:00","first_seen_at":"2026-10-23T21:57:14+00:00","fetched_at":"2026-10-23T22:28:55+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"}