{"id":"CVE-2023-39780","kind":"vulnerability","aliases":["CVE-2023-39780"],"related":[],"title":"asus rt-ax55 firmware: On ASUS RT-AX55 3.0.0.4.386.51598 devices, authenticated attackers can perform OS command injection via the…","description":"On ASUS RT-AX55 3.0.0.4.386.51598 devices, authenticated attackers can perform OS command injection via the /start_apply.htm qos_bw_rulelist parameter. NOTE: for the similar \"token-generated module\" issue, see CVE-2023-41345; for the similar \"token-refresh module\" issue, see CVE-2023-41346; for the similar \"check token module\" issue, see CVE-2023-41347; and for the similar \"code-authentication module\" issue, see CVE-2023-41348.","summary":"ASUS RT-AX55 routers contain an OS command injection flaw that lets a remote attacker run arbitrary commands on the device. The sources say the attacker must be authenticated, and CISA lists it as actively exploited.","severity":"high","cvss":8.8,"epss":null,"exploited":true,"exploited_at":"2025-06-02T00:00:00+00:00","products":[{"name":"ASUS RT-AX55 Routers","fixed":[],"affected":"","ecosystem":"vendor"},{"name":"asus rt-ax55 firmware","fixed":[],"affected":"= 3.0.0.4.386.51598","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["asus","exploited","infrastructure","routers","rt-ax55","self-hosted"],"not_affected_if":["no-rt-ax55-in-use"],"how_to_check":null,"fix":"Apply the mitigation from the vendor per CISA guidance, or discontinue use of the router if no mitigation is available. Specific firmware version not stated in sources.","status":"open","published_at":"2023-09-11T19:15:43+00:00","first_seen_at":"2026-10-23T19:11:51+00:00","triaged_at":"2026-10-23T20:48:26+00:00","updated_at":"2026-10-23T22:29:05+00:00","category":"infrastructure","confidence":0.6,"triage":{"at":"2026-10-23T20:48:26Z","model":"claude-haiku-5-5","output":{"fix":"Apply the mitigation from the vendor per CISA guidance, or discontinue use of the router if no mitigation is available. Specific firmware version not stated in sources.","reach":"network","summary":"ASUS RT-AX55 routers contain an OS command injection flaw that lets a remote attacker run arbitrary commands on the device. The sources say the attacker must be authenticated, and CISA lists it as actively exploited.","category":"infrastructure","who_cares":["asus","rt-ax55","routers","self-hosted"],"confidence":0.6,"needs_auth":"yes","worst_case":"Remote attacker runs arbitrary OS commands on the router after authenticating.","analyst_note":"Find the ASUS advisory and affected/fixed firmware versions for RT-AX55; check the CISA KEV entry for due date and mitigation details.","how_to_check":"unknown","needs_analyst":true,"not_affected_if":["no-rt-ax55-in-use"],"user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"unknown"},"cost_usd":0.000443,"input_tokens":2560,"output_tokens":373,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-2023':22A,25A,116C,128C,139C,152C '-39780':23A,26A '-41345':117C '-41346':129C '-41347':140C '-41348':153C '/start_apply.htm':100C '3.0.0.4.386.51598':11A,89C 'activ':82B 'arbitrari':64B 'asus':1A,7A,27A,32A,37B,47B,85C 'attack':14A,62B,73B,92C 'authent':13A,76B,91C,147C 'ax55':4A,10A,30A,35A,43B,50B,88C 'bw':102C 'check':133C 'cisa':78B 'code':146C 'code-authent':145C 'command':18A,55B,65B,96C 'contain':52B 'cve':21A,24A,115C,127C,138C,151C 'devic':12A,68B,90C 'exploit':38B,83B 'firmwar':5A 'firmware':36A 'flaw':57B 'generat':111C 'host':46B 'infrastructur':39B 'inject':19A,56B,97C 'issu':113C,125C,136C,149C 'let':59B 'list':79B 'modul':112C,124C,135C,148C 'must':74B 'note':105C 'os':17A,54B,95C 'paramet':104C 'perform':16A,94C 'qos':101C 'refresh':123C 'remot':61B 'router':40B,51B 'routers':31A 'rt':3A,9A,29A,34A,42B,49B,87C 'rt-ax55':2A,8A,28A,33A,41B,48B,86C 'rulelist':103C 'run':63B 'say':71B 'see':114C,126C,137C,150C 'self':45B 'self-host':44B 'similar':108C,120C,132C,144C 'sourc':70B 'token':110C,122C,134C 'token-gener':109C 'token-refresh':121C 'via':20A,98C","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2023-09-11T19:15:43+00:00","kev":{"dateAdded":"2025-06-02","dueDate":"2025-06-23","requiredAction":"Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.","knownRansomwareCampaignUse":"Unknown"},"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":"kev","external_id":"CVE-2023-39780","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2023-39780","severity":null,"published_at":"2025-06-02T00:00:00+00:00","modified_at":null,"first_seen_at":"2026-10-23T19:11:51+00:00","fetched_at":"2026-10-25T10:39:05+00:00","note":null},{"source":"nvd","external_id":"CVE-2023-39780","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-39780","severity":null,"published_at":"2023-09-11T19:15:43+00:00","modified_at":"2026-06-17T06:12:51+00:00","first_seen_at":"2026-10-23T22:29:05+00:00","fetched_at":"2026-10-23T22:29:05+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"}