{"id":"CVE-2022-20700","kind":"vulnerability","aliases":["CVE-2022-20700"],"related":[],"title":"Cisco Small Business RV160, RV260, RV340, and RV345 Series Routers: Cisco Small Business RV Series Routers Stack-based Buffer Overflow Vulnerability","description":"Multiple vulnerabilities in Cisco Small Business RV160, RV260, RV340, and RV345 Series Routers could allow an attacker to do any of the following: Execute arbitrary code Elevate privileges Execute arbitrary commands Bypass authentication and authorization protections Fetch and run unsigned software Cause denial of service (DoS) For more information about these vulnerabilities, see the Details section of this advisory.","summary":"Cisco Small Business RV160, RV260, RV340 and RV345 routers have a stack-based buffer overflow in their web-based management interface. An attacker can run arbitrary code on the router, bypass authentication, or cause a denial of service.","severity":"critical","cvss":10.0,"epss":0.05655,"exploited":true,"exploited_at":"2022-03-03T00:00:00+00:00","products":[{"name":"Cisco Small Business RV160, RV260, RV340, and RV345 Series Routers","fixed":[],"affected":"","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["cisco","exploited","infrastructure","routers","rv340","rv345","small-business"],"not_affected_if":["unknown"],"how_to_check":null,"fix":"Apply the Cisco firmware updates per vendor instructions; the sources do not name the fixed firmware version.","status":"open","published_at":"2022-02-10T18:15:09+00:00","first_seen_at":"2026-10-23T19:11:52+00:00","triaged_at":"2026-10-23T21:24:26+00:00","updated_at":"2026-10-23T21:57:35+00:00","category":"infrastructure","confidence":0.7,"triage":{"at":"2026-10-23T21:24:26Z","model":"claude-haiku-5-5","output":{"fix":"Apply the Cisco firmware updates per vendor instructions; the sources do not name the fixed firmware version.","reach":"unknown","impact":"high","summary":"Cisco Small Business RV160, RV260, RV340 and RV345 routers have a stack-based buffer overflow in their web-based management interface. An attacker can run arbitrary code on the router, bypass authentication, or cause a denial of service.","category":"infrastructure","who_cares":["cisco","routers","small-business","rv340","rv345"],"confidence":0.7,"needs_auth":"unknown","worst_case":"Attacker runs arbitrary code on the router and bypasses authentication.","analyst_note":"Find the Cisco advisory for CVE-2022-20700 for the fixed firmware versions, the affected management interface, and whether it is reachable from WAN; CISA KEV lists it as exploited.","how_to_check":"unknown","needs_analyst":true,"not_affected_if":["unknown"],"user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.000482,"input_tokens":2948,"output_tokens":374,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-2022':24A,27A '-20700':25A,28A 'advisori':146C 'allow':102C 'and':35A 'arbitrari':75B,112C,117C 'attack':72B,104C 'authent':81B,120C 'author':122C 'base':19A,61B,68B 'buffer':20A,62B 'busi':3A,13A,47B,50B,93C 'business':31A 'bypass':80B,119C 'caus':83B,129C 'cisco':1A,11A,29A,39B,48B,91C 'code':76B,113C 'command':118C 'could':101C 'cve':23A,26A 'denial':85B,130C 'detail':142C 'dos':133C 'elev':114C 'execut':111C,116C 'exploit':40B 'fetch':124C 'follow':110C 'inform':136C 'infrastructur':41B 'interfac':70B 'manag':69B 'multipl':88C 'overflow':21A,63B 'privileg':115C 'protect':123C 'router':10A,16A,42B,56B,79B,100C 'routers':38A 'run':74B,126C 'rv':14A 'rv160':4A,32A,51B,94C 'rv260':5A,33A,52B,95C 'rv340':6A,34A,43B,53B,96C 'rv345':8A,36A,44B,55B,98C 'section':143C 'see':140C 'seri':9A,15A,99C 'series':37A 'servic':87B,132C 'small':2A,12A,30A,46B,49B,92C 'small-busi':45B 'softwar':128C 'stack':18A,60B 'stack-bas':17A,59B 'unsign':127C 'vulner':22A,89C,139C 'web':67B 'web-bas':66B","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2022-02-10T18:15:09+00:00","kev":{"dateAdded":"2022-03-03","dueDate":"2022-03-17","requiredAction":"Apply updates per vendor instructions.","knownRansomwareCampaignUse":"Unknown"},"cvss_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","cvss_by":"psirt@cisco.com","poc_count":0,"sources":[{"source":"kev","external_id":"CVE-2022-20700","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2022-20700","severity":null,"published_at":"2022-03-03T00:00:00+00:00","modified_at":null,"first_seen_at":"2026-10-23T19:11:52+00:00","fetched_at":"2026-10-25T11:39:17+00:00","note":null},{"source":"epss","external_id":"CVE-2022-20700","url":"https://api.first.org/data/v1/epss?cve=CVE-2022-20700","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-2022-20700","url":"https://nvd.nist.gov/vuln/detail/CVE-2022-20700","severity":null,"published_at":"2022-02-10T18:15:09+00:00","modified_at":"2026-06-17T04:24:53+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"}